chore!: update dotnet 10

[Soap-141]

GitHub Issue: #

Proposed Changes

• Bug fix
• Feature
• Code style update (formatting)
• Refactoring (no functional changes, no api changes)
• Build or CI related changes
• Documentation content changes
• Other, please describe:

What is the current behavior?

Targets .NET 7.
Targets Uno 5.

What is the new behavior?

Targets .NET 10.
Targets Uno 6.

Impact on version

• Major (Public API was modified.)
  • Public constructs (class, struct, delegate, enum, etc.) were removed or renamed.
  • Public members were removed or renamed.
  • Public method signatures were changed or renamed.
• Minor (Public API was extended.)
  • Public constructs, members, or overloads were added.
• Patch (Public API was unchanged.)
  • A bug in behavior was fixed.
  • Documentation was changed.
• None (The library is unchanged.)
  • Only code under the build folder was changed.
  • Only code under the .github folder was changed.

Checklist

Please check that your PR fulfills the following requirements:

• Documentation has been added/updated.
  • README.md was reviewed.
  • BREAKING_CHANGES.md was updated (if you introduced a breaking change).
• Automated Unit / Integration tests for the changes have been added/updated.
• Your conventional commits are aligned with the Impact on version section.

Other information

[Copilot]

Pull request overview

This pull request updates the MessageDialogService library from .NET 7 to .NET 10 and from Uno Platform 5 to 6. This is a major breaking change that removes support for Mac platforms (macOS and Mac Catalyst).

• Updated target frameworks from .NET 7 to .NET 10 across the solution
• Upgraded Uno.WinUI from version 5.0.19 to 6.3.62
• Updated build infrastructure to use .NET 10 SDK and newer build agents
• Removed Mac platform support (net10.0-maccatalyst and net10.0-macos)

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
MessageDialog.csproj	Updated Microsoft.SourceLink.GitHub from 1.1.1 to 8.0.0
MessageDialog.Uno.WinUI.csproj	Migrated from MSBuild.Sdk.Extras to Microsoft.NET.Sdk; updated target frameworks to .NET 10; upgraded Uno.WinUI to 6.3.62; updated Windows SDK references; removed Mac platform targets
MessageDialog.Tests.csproj	Updated test dependencies: Microsoft.NET.Test.Sdk to 18.0.1, Moq to 4.20.72, FluentAssertions to 7.2.0, xunit to 2.9.3, and xunit.runner.visualstudio to 3.1.5
stage-build.yml	Updated .NET version to 10.0.100 and UnoCheck version to 1.33.1 with new manifest reference
azure-pipelines.yml	Updated build agent image from windows-2022 to windows-2025
BREAKING_CHANGES.md	Documented version 3.0.0 breaking changes including .NET and Uno upgrades and Mac support removal

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