ftw: impl FilesystemStatistics, symlink_metadata and use it

[fox0]

No description provided.

[fox0]

#300 (comment)

[fox0]

Ready for review @jgarzik

[Copilot]

Pull Request Overview

This pull request implements the FilesystemStatistics functionality, updates how metadata is retrieved using ftw’s new API, and refactors various file operations (remove, move, list, and magic detection) to use the new API consistently.

• tree/rm.rs, tree/mv.rs, and tree/ls.rs now consistently use ftw’s metadata and symlink_metadata functions.
• tree/ls_util/entry.rs has been updated to use permission methods instead of raw mode bits.
• Files under file/ have been refactored for improved API usage and to allow FilesystemStatistics integration.
• A new file ftw/src/small_c_string.rs has been added, and Cargo.toml dependency configurations are updated accordingly.

Reviewed Changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tree/rm.rs	Updated metadata parameter names and API usage for improved clarity.
tree/mv.rs	Refactored metadata access and error handling with new API.
tree/ls_util/entry.rs	Replaced raw mode bit checks with permission API calls.
tree/ls.rs	Consistent use of new metadata API and reduced CString conversions.
ftw/src/small_c_string.rs	Introduced a new utility module for small C string handling.
file/magic.rs	Changed to generic path parameters for magic file processing.
file/file.rs	Refactored analyze_file to return message strings for cleaner output.
Cargo.toml files	Updated dependency declarations for ftw integration.