internal: add lock for writing target/packages.json

[Young-Flash]

cc @bzy-debug

[peter-jerry-ye-code-review]

Observed Problems from the git diff Output

1. Dependency Version Update in Cargo.toml:

   • The fs4 dependency version is updated from 0.8.3 to 0.10.0. It's important to ensure that the application logic is compatible with the new version, especially since the checksum has also changed.
   • Suggestion: Review the fs4 crate's changelog or release notes to understand any breaking changes or new features that might affect the codebase.

2. File Locking Mechanism Change:

   • The file locking mechanism in crates/moonutil/src/common.rs is changed from fs4::FileExt to fs4::fs_std::FileExt. This could potentially affect how file locks are acquired and might introduce subtle bugs if the behavior of the locking mechanism has changed.
   • Suggestion: Thoroughly test the file locking functionality to ensure that it behaves as expected under various conditions (e.g., concurrent access, race conditions).

3. Unused Import Removal:

   • The import use moonutil::common::FileLock; in crates/moonbuild/src/check/normal.rs is added without any corresponding usage in the changed lines. This could be a typo or an oversight.
   • Suggestion: Verify if the FileLock import is indeed necessary. If not, it should be removed to avoid unnecessary dependencies and potential confusion. If it is necessary, ensure it is used appropriately within the function or module.

Summary

• Dependency Update: Carefully review the fs4 crate's changelog for compatibility.
• File Locking Mechanism: Test the new locking mechanism for correct behavior.
• Unused Import: Verify the necessity of the FileLock import and remove it if not used.

These observations are based on the provided git diff output and are meant to prompt further investigation to ensure the changes do not introduce bugs or inconsistencies.