feat: restore unmodified files from cache during cleanup

[Kitenite]

Description

This PR addresses the issue of large, noisy commits caused by unnecessary transformations of all .jsx/.tsx files. Now, during the cleanup process, any file that remains unchanged since the initial transform will be restored from its cached original.

Related Issues

Closes onlook-dev#1738

Type of Change

• Bug fix
• New feature
• Documentation update
• Release
• Refactor
• Other (please describe):

Testing

Screenshots (if applicable)

Additional Notes

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Important

Restores unmodified .jsx/.tsx files from cache during cleanup by comparing file hashes, reducing unnecessary transformations.

• Behavior:
  • During cleanup, unmodified .jsx/.tsx files are restored from cache instead of being transformed again.
  • checkIfFileChanged() in cleanup.ts compares file hashes to determine if a file has changed.
• Caching:
  • cacheFile() and generateAndStoreHash() in setup.ts store original file content and hashes in .onlook/cache.
  • removeCacheDirectory() in files.ts deletes the cache directory during cleanup.
• Models:
  • Adds HashesJson type in cache/index.ts to store file hashes and cache paths.
• Misc:
  • Updates IGNORED_DIRECTORIES in helpers.ts to include .onlook.

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