feat: add new connectivity & directory check commands [IDE-1557]

[rrama]

Description

Also refactor test mocks to be non-global mocks so we ensure no leaks between tests.

Relies on LS PR: snyk/snyk-ls#1080

Checklist

• Read and understood the Code of Conduct and Contributing Guidelines.
• Tests added and all succeed
• Linted
• CHANGELOG.md updated
• No longer a thing.
• README.md updated, if user-facing
• N/A

Screenshots / GIFs

Visuals that may help the reviewer. Please add screenshots for any UI change. GIFs are most welcome!

[snyk-io]

✅ Snyk checks have passed. No issues have been found so far.

Status	Scan Engine	Critical	High	Medium	Low	Total (0)
✅	Open Source Security	0	0	0	0	0 issues
✅	Licenses	0	0	0	0	0 issues
✅	Code Security	0	0	0	0	0 issues

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[snyk-pr-review-bot]

PR Reviewer Guide 🔍

🧪 PR contains tests

🔒 No security concerns identified

⚡ Recommended focus areas for review Missing Command Palette Entry 🟠 [major] The new commands snyk.collectConnectivityDiagnostics and snyk.collectDirectoryDiagnostics are registered in the commands contribution point but are not added to the menus.commandPalette section. This means the tools will not appear in the Command Palette (Cmd+Shift+P), making them undiscoverable and unreachable for regular users without manually defining shortcuts or using the debugger. { "command": "snyk.collectConnectivityDiagnostics", "title": "Collect Connectivity Diagnostics", "category": "Snyk" }, { "command": "snyk.collectDirectoryDiagnostics", "title": "Collect Directory Diagnostics", "category": "Snyk"

📚 Repository Context Analyzed This review considered 37 relevant code sections from 15 files (average relevance: 0.77) src/snyk/extension.ts (lines 121-740) src/snyk/common/commands/commandController.ts (lines 1-309) CONTRIBUTING.md (lines 1-100) src/snyk/common/llm/geminiIntegrationService.ts (lines 1-385) package.json (lines 1-100) src/snyk/common/constants/languageServer.ts (lines 1-18) src/snyk/common/constants/views.ts (lines 1-42) ... and 8 more file(s)