Add namespace synchronization feature

[chandelima]

Description

Implements a new command to automatically synchronize C# namespace declarations with their folder structure.

Changes

• Added csharp.syncNamespaces command that scans all .csproj files in workspace
• Calculates expected namespace based on file path relative to project root
• Supports both file-scoped (namespace Foo.Bar;) and block-scoped (namespace Foo.Bar { }) syntax
• Enhanced directory exclusions to prevent scanning system/build directories (bin, obj, .git, node_modules, etc.)
• User confirmation prompt with three options: Apply Changes / Preview Only / Cancel
• Preview mode shows all changes grouped by project without applying them

Testing

• Added 20 unit tests covering namespace calculation, csproj analysis, and path handling
• Added 4 integration tests covering end-to-end workflow
• All 527 tests passing (167 C# + 350 Razor + 10 Tasks)

[chandelima]

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[Copilot]

Pull request overview

This PR implements a new namespace synchronization feature that automatically aligns C# namespace declarations with their folder structure. The feature adds a csharp.syncNamespaces command that scans .csproj files, calculates expected namespaces based on file paths, and offers users options to apply changes, preview them, or cancel.

Changes:

• Added namespace calculation and extraction logic supporting both file-scoped and block-scoped syntax
• Implemented .csproj file analysis to extract root namespaces and find C# files
• Created main sync command with user prompts and workspace edit functionality
• Added 24 unit and integration tests (though several have quality issues)
• Integrated telemetry tracking for the new command

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 10 comments.

Show a summary per file

File	Description
test/lsptoolshost/unitTests/namespaceCalculator.test.ts	Unit tests for namespace calculation and extraction functions
test/lsptoolshost/unitTests/csprojAnalyzer.test.ts	Unit tests for .csproj file parsing (tests don't call actual implementation)
test/lsptoolshost/integrationTests/namespaceSync.integration.test.ts	Integration tests for sync workflow (mostly smoke tests with weak assertions)
src/shared/telemetryEventNames.ts	Added NamespaceSyncCommand telemetry event
src/lsptoolshost/refactoring/namespaceSync.ts	Main command implementation with preview and apply logic
src/lsptoolshost/refactoring/namespaceCalculator.ts	Core namespace calculation and extraction functions
src/lsptoolshost/refactoring/csprojAnalyzer.ts	Functions to find .csproj and .cs files, extract root namespace
src/lsptoolshost/commands.ts	Registered the new csharp.syncNamespaces command
package.nls.json	Added localization string for the command
package.json	Added command definition with workspace trust requirement

[Copilot]

Pull request overview

Copilot reviewed 11 out of 11 changed files in this pull request and generated 8 comments.