Function validate_move 

pub fn validate_move(
    repo: &Repository,
    source: &WorktreeDescriptor,
    target_name: &str,
    options: &MoveOptions,
) -> Result<()>

Validate that a move from source to target_name is safe to perform.

Checks (unless options.force is set):

• Source is not detached HEAD
• Target does not already exist as a worktree or branch
• Source is not a protected branch
• Source has no uncommitted changes
• Source has no unpushed commits