deps: update project dependencies

[sbroenne]

Summary

• Update NuGet SDK/package pins, npm dev dependencies, and package locks.
• Update GitHub Actions references in active workflows and Squad workflow templates.
• Refresh the local uv lock resolution; tracked Python inputs were already current.

Validation

• dotnet test Sbroenne.WindowsMcp.sln --configuration Release --filter "Category!=RequiresDesktop&Category!=RequiresDisplay" --verbosity minimal
• npm run compile --prefix vscode-extension -- --pretty false
• npm run lint --prefix vscode-extension
• npm audit --prefix vscode-extension --audit-level=moderate
• npm run build --prefix tests\Sbroenne.WindowsMcp.Tests\Integration\ElectronHarness -- --pretty false
• npm audit --prefix tests\Sbroenne.WindowsMcp.Tests\Integration\ElectronHarness --audit-level=moderate
• actionlint