throw an error if custom-id is not a string

[gamercrewdev]

Summary

Add an error if the custom ID of a UI object is not a string.

What is the feature request for?

The core library

The Problem

The custom-id must be a string, otherwise the callback will not be executed and no error is thrown.

The Ideal Solution

Add an error message if the custom-id is not of type string.

[xXenvy]

Just follow the typehints and you will avoid such cases.

[lordcod]

Hi, in my fork I made such a system if the view is not found, the on_view_not_found event will be called where the interaction is passed.