fn insert_string(_: ())Expand description
Prompt the user to select a [fkr::FkrOption] and insert its generated string.
The user is shown a selection menu via [ytil_noxi::vim_ui_select::open]; on
selection the corresponding generated string is inserted at the cursor using
[ytil_noxi::buffer::BufferExt::set_text_at_cursor_pos].
Behaviour:
- Returns early (no insertion) if fetching user input fails or is canceled.
- Emits error notifications to Nvim for selection prompt or buffer write failures.