Function is_git_dirty 

pub fn is_git_dirty(project_dir: &Path) -> bool

Check if the git working directory has uncommitted changes.

Runs git status --porcelain and returns true if there is any output, indicating uncommitted changes (modified, staged, or untracked files).

Returns false if:

• The directory is not a git repository
• Git is not available on the system
• The working directory is clean

Arguments

• project_dir - Directory to check (should contain .git)