Add release smoke test workflow

.github/workflows/release-smoke-test.yml

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+name: Release Smoke Test
+
+on:
+  pull_request:
+    branches: [ "main" ]
+    paths:
+      - '.github/workflows/release-smoke-test.yml'
+      - 'testing/release-smoke/**'
+  workflow_dispatch:
+    inputs:
+      release-repository:
+        description: 'GitHub repository to download the release from'
+        required: true
+        default: 'Devolutions/UniGetUI'
+      release-tag:
+        description: 'Release tag to test. Leave empty for the latest release.'
+        required: false
+        default: ''
+      installer-asset-name:
+        description: 'Installer asset name in the GitHub release'
+        required: true
+        default: 'UniGetUI.Installer.x64.exe'
+      max-stage:
+        description: 'Last smoke-test stage to run'
+        required: true
+        type: choice
+        default: 'install-launch'
+        options:
+          - rdp
+          - rdp-client
+          - remoting-server
+          - remote-command
+          - install-launch
+
+jobs:
+  release-smoke-test:
+    name: Windows release smoke test
+    runs-on: windows-latest
+    timeout-minutes: 90
+    permissions:
+      contents: read
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v6
+
+      - name: Run release smoke test
+        shell: pwsh
+        env:
+          GITHUB_TOKEN: ${{ github.token }}
+          RELEASE_REPOSITORY: ${{ github.event.inputs['release-repository'] || 'Devolutions/UniGetUI' }}
+          RELEASE_TAG: ${{ github.event.inputs['release-tag'] || '' }}
+          INSTALLER_ASSET_NAME: ${{ github.event.inputs['installer-asset-name'] || 'UniGetUI.Installer.x64.exe' }}
+          MAX_STAGE: ${{ github.event.inputs['max-stage'] || 'install-launch' }}
+        run: |
+          .\testing\release-smoke\Invoke-ReleaseSmokeTest.ps1 `
+            -ReleaseRepository $env:RELEASE_REPOSITORY `
+            -ReleaseTag $env:RELEASE_TAG `
+            -InstallerAssetName $env:INSTALLER_ASSET_NAME `
+            -MaxStage $env:MAX_STAGE `
+            -ArtifactsDir '${{ github.workspace }}\artifacts\release-smoke'
+
+      - name: Cleanup release smoke test
+        if: always()
+        shell: pwsh
+        run: |
+          .\testing\release-smoke\Invoke-ReleaseSmokeTest.ps1 `
+            -CleanupOnly `
+            -ArtifactsDir '${{ github.workspace }}\artifacts\release-smoke'
+
+      - name: Upload release smoke artifacts
+        if: always()
+        uses: actions/upload-artifact@v7
+        with:
+          name: release-smoke-test
+          path: artifacts\release-smoke
+          if-no-files-found: warn

testing/release-smoke/Enable-LocalRdp.ps1

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+[CmdletBinding(DefaultParameterSetName = 'Enable')]
+param(
+    [Parameter(ParameterSetName = 'Enable')]
+    [Parameter(ParameterSetName = 'Cleanup')]
+    [string] $StatePath = (Join-Path $env:RUNNER_TEMP 'unigetui-release-smoke-rdp-state.json'),
+
+    [Parameter(ParameterSetName = 'Cleanup')]
+    [switch] $Cleanup
+)
+
+Set-StrictMode -Version Latest
+$ErrorActionPreference = 'Stop'
+
+$terminalServerPath = 'HKLM:\System\CurrentControlSet\Control\Terminal Server'
+$rdpTcpPath = Join-Path $terminalServerPath 'WinStations\RDP-Tcp'
+$rdpGroupName = 'Remote Desktop Users'
+
+function Get-RegistryValue {
+    param(
+        [Parameter(Mandatory)]
+        [string] $Path,
+
+        [Parameter(Mandatory)]
+        [string] $Name
+    )
+
+    $property = Get-ItemProperty -Path $Path -Name $Name -ErrorAction SilentlyContinue
+    if ($null -eq $property) {
+        return $null
+    }
+
+    return $property.$Name
+}
+
+function Write-JsonFile {
+    param(
+        [Parameter(Mandatory)]
+        [string] $Path,
+
+        [Parameter(Mandatory)]
+        [object] $Value
+    )
+
+    $directory = Split-Path -Path $Path -Parent
+    New-Item -Path $directory -ItemType Directory -Force | Out-Null
+    $Value | ConvertTo-Json -Depth 8 | Set-Content -Path $Path -Encoding utf8NoBOM
+}
+
+function Test-TcpPort {
+    param(
+        [Parameter(Mandatory)]
+        [string] $HostName,
+
+        [Parameter(Mandatory)]
+        [int] $Port
+    )
+
+    $client = [System.Net.Sockets.TcpClient]::new()
+    try {
+        $connect = $client.BeginConnect($HostName, $Port, $null, $null)
+        if (-not $connect.AsyncWaitHandle.WaitOne([TimeSpan]::FromSeconds(1))) {
+            return $false
+        }
+
+        $client.EndConnect($connect)
+        return $true
+    }
+    catch {
+        return $false
+    }
+    finally {
+        $client.Dispose()
+    }
+}
+
+function Wait-TcpPort {
+    param(
+        [Parameter(Mandatory)]
+        [string] $HostName,
+
+        [Parameter(Mandatory)]
+        [int] $Port,
+
+        [int] $TimeoutSeconds = 30
+    )
+
+    $deadline = (Get-Date).AddSeconds($TimeoutSeconds)
+    do {
+        if (Test-TcpPort -HostName $HostName -Port $Port) {
+            return
+        }
+
+        Start-Sleep -Seconds 1
+    } while ((Get-Date) -lt $deadline)
+
+    throw "Timed out waiting for $HostName`:$Port to accept TCP connections."
+}
+
+if ($Cleanup) {
+    if (-not (Test-Path $StatePath)) {
+        return
+    }
+
+    $state = Get-Content -Path $StatePath -Raw | ConvertFrom-Json
+
+    if ($null -ne $state.fDenyTSConnections) {
+        Set-ItemProperty -Path $terminalServerPath -Name 'fDenyTSConnections' -Value ([int] $state.fDenyTSConnections)
+    }
+
+    if ($null -ne $state.UserAuthentication) {
+        Set-ItemProperty -Path $rdpTcpPath -Name 'UserAuthentication' -Value ([int] $state.UserAuthentication)
+    }
+
+    foreach ($rule in @($state.FirewallRules)) {
+        if ($null -ne $rule.Name -and $null -ne $rule.Enabled) {
+            Set-NetFirewallRule -Name $rule.Name -Enabled $rule.Enabled -ErrorAction SilentlyContinue
+        }
+    }
+
+    if ($state.AddedToRemoteDesktopUsers) {
+        Remove-LocalGroupMember -Group $rdpGroupName -Member $state.LocalUserName -ErrorAction SilentlyContinue
+    }
+
+    Remove-Item -Path $StatePath -Force -ErrorAction SilentlyContinue
+    return
+}
+
+$localUserName = $env:USERNAME
+if ([string]::IsNullOrWhiteSpace($localUserName)) {
+    throw 'USERNAME is not set; cannot configure a local RDP user.'
+}
+
+$passwordBytes = [System.Security.Cryptography.RandomNumberGenerator]::GetBytes(24)
+$temporaryPassword = 'RdpSmoke!' + [Convert]::ToBase64String($passwordBytes) + 'aA1!'
+Write-Host "::add-mask::$temporaryPassword"
+
+$currentMembers = @(Get-LocalGroupMember -Group $rdpGroupName -ErrorAction SilentlyContinue | ForEach-Object { $_.Name })
+$memberNames = @($localUserName, "$env:COMPUTERNAME\$localUserName")
+$wasRdpMember = [bool]($currentMembers | Where-Object { $memberNames -contains $_ } | Select-Object -First 1)
+
+$state = [pscustomobject]@{
+    LocalUserName = $localUserName
+    DomainUserName = "$env:COMPUTERNAME\$localUserName"
+    fDenyTSConnections = Get-RegistryValue -Path $terminalServerPath -Name 'fDenyTSConnections'
+    UserAuthentication = Get-RegistryValue -Path $rdpTcpPath -Name 'UserAuthentication'
+    FirewallRules = @(Get-NetFirewallRule -DisplayGroup 'Remote Desktop' -ErrorAction SilentlyContinue | Select-Object -Property Name, Enabled)
+    AddedToRemoteDesktopUsers = (-not $wasRdpMember)
+}
+Write-JsonFile -Path $StatePath -Value $state
+
+$securePassword = ConvertTo-SecureString -String $temporaryPassword -AsPlainText -Force
+Set-LocalUser -Name $localUserName -Password $securePassword
+
+if (-not $wasRdpMember) {
+    Add-LocalGroupMember -Group $rdpGroupName -Member $localUserName
+}
+
+Set-ItemProperty -Path $terminalServerPath -Name 'fDenyTSConnections' -Value 0
+Set-ItemProperty -Path $rdpTcpPath -Name 'UserAuthentication' -Value 0
+Set-Service -Name TermService -StartupType Automatic
+Start-Service -Name TermService
+Enable-NetFirewallRule -DisplayGroup 'Remote Desktop' | Out-Null
+Wait-TcpPort -HostName '127.0.0.1' -Port 3389
+
+[pscustomobject]@{
+    UserName = $localUserName
+    DomainUserName = "$env:COMPUTERNAME\$localUserName"
+    Password = $temporaryPassword
+    HostName = '127.0.0.1'
+    Port = 3389
+    StatePath = $StatePath
+} | ConvertTo-Json -Compress