Function should_create_new_branch 

pub(crate) fn should_create_new_branch(branch_name: &str) -> Result<bool>

Returns true if a new branch may be created following the desired behavior.

Behaviour:

• Always allowed when target is a default branch (main/master).
• Always allowed when current branch is a default branch.
• Otherwise, requires user confirmation via empty line input (non‑empty aborts).

Errors

• Current branch discovery via [ytil_git::branch::get_current] fails.
• Reading user confirmation input fails.