chore: update dependencies and switch to oxlint

[sbroenne]

Summary

• update NuGet, npm, and uv-managed dependency locks
• replace VS Code extension ESLint setup with Oxlint
• update Electron harness dependencies

Validation

• dotnet test tests\Sbroenne.WindowsMcp.Tests\Sbroenne.WindowsMcp.Tests.csproj --no-restore --no-build --filter "FullyQualifiedName~Unit" --verbosity minimal
• npm run compile && npm run lint in vscode-extension
• npm run build in tests/Sbroenne.WindowsMcp.Tests/Integration/ElectronHarness