Make prompt available as form element

This idea would be quite challenging, because routes are tied to entities:

/admin/config/aiprompt/{aiprompt_config}/segment/add/{plugin_id}
/admin/config/aiprompt/{aiprompt_config}/segment/{segment_id}/edit
/admin/config/aiprompt/{aiprompt_config}/segment/{segment_id}/delete

/admin/config/aiprompt/{aiprompt_config}/argument/add/{plugin_id}
/admin/config/aiprompt/{aiprompt_config}/argument/{argument_name}/edit
/admin/config/aiprompt/{aiprompt_config}/argument/{argument_name}/delete

/aiprompt/{aiprompt}/edit/segment/add/{plugin_id}
/aiprompt/{aiprompt}/edit/segment/{segment_id}/edit
/aiprompt/{aiprompt}/edit/segment/{segment_id}/delete

/aiprompt/{aiprompt}/edit/argument/add/{plugin_id}
/aiprompt/{aiprompt}/edit/argument/{argument_name}/edit
/aiprompt/{aiprompt}/edit/argument/{argument_name}/delete

Never seen this before, but maybe is possible to tie the route to ID of $form_state, so ensuring all this is saved under particular $form_state.