Add workspace context tests

[AgentEnder]

Summary

• add Rust tests for WorkspaceContext increment updates and project file map updates
• add Rust tests for grouping workspace files by project

Testing

• pnpm nx run-many -t lint,test,build (fails: NX Lexer error and network failure)
• pnpm test:e2e (fails: command not found)

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https://chatgpt.com/codex/tasks/task_e_684c45cbc2c0832c9a309b9ba1e6d5c8

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Name	Status	Preview	Updated (UTC)
nx-dev	✅ Ready (Inspect)	Visit Preview	Jun 13, 2025 11:09pm

[nx-cloud[bot]]

View your CI Pipeline Execution ↗ for commit b60edd58630de455b4db274b8de3bd576c199d7d.

Command	Status	Duration	Result
nx run-many -t check-imports check-commit check...	❌ Failed	18s	View ↗
nx affected --targets=lint,test,build,e2e,e2e-c...	✅ Succeeded	44s	View ↗
nx-cloud record -- nx-cloud conformance:check	✅ Succeeded	2s	View ↗
nx-cloud record -- nx sync:check	✅ Succeeded	3s	View ↗
nx-cloud record -- nx format:check	✅ Succeeded	3s	View ↗
nx documentation	✅ Succeeded	6m 12s	View ↗

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☁️ Nx Cloud last updated this comment at 2025-06-13 22:44:39 UTC

[github-actions[bot]]

This pull request has already been merged/closed. If you experience issues related to these changes, please open a new issue referencing this pull request.