Function get_commit_files_with_status 

pub fn get_commit_files_with_status(hash: &str) -> Result<Vec<String>>

Get files changed in a commit with their status (A/M/D).

Returns a list of strings in the format “STATUS:filename” (e.g., “A:file.txt”, “M:file.txt”).

Errors

Returns error if commit hash is invalid or git command fails.