Function sync_to_hooks 

pub fn sync_to_hooks(
    config: &Config,
    hooks_dir: &Path,
    force: bool,
) -> Result<(usize, usize)>

Write/remove hook scripts in hooks_dir to match config.

When force is true, pre-existing hooks that are not managed by githops are overwritten instead of skipped.

Returns (installed_count, skipped_count).