is there a way to add a new action to a model (e.g. Sales order) from Odoo interface or odoo studio without developing a custom module?

Example: a Quotation need to be verified by an action, so I need to add the action "VERIFY" under "actions, where this action should call a python function as well:

"Actions" :

Delete, duplicate, Invoice order, VERIFY <-- new action

Python: handle_VERIFY(){

//run code

}