fix: zip project import

[RohitKushvaha01]

Closes #2421

[greptile-apps]

Greptile Summary

This PR updates project import from zip files. The main changes are:

• Creates a unique extraction folder when the default project folder already exists.
• Adds cancellation handling during zip extraction.
• Sanitizes zip entry paths before writing them.
• Recursively creates folders and files while importing entries.

Confidence Score: 5/5

This looks safe to merge.

• No blocking issues found in the changed code.

Important Files Changed

Filename	Overview
src/pages/fileBrowser/fileBrowser.js	Updates zip project import to use a unique extraction folder, sanitize entry paths, create nested paths, and clean up on cancellation.

_{Reviews (2): Last reviewed commit: "fix: file override" | Re-trigger Greptile}

[RohitKushvaha01]

@greptileai