Random Beat Creator for BB EDITOR

A RANDOMISER feature & button must be introduced to Beat-Bassline Editor so that producers can get outside of creative block , when they get Random beats on the step sequencer when they press RANDOMISER Button.
Those beat can be further modified by user for humans acceptance.

The issue names no files, tests, or entry points. Start by locating the Beat-Bassline Editor, its step sequencer, and the requested RANDOMISER button, then determine how random beats can be generated and edited. Done means the button produces a modifiable random beat pattern in the editor.

Written by the indexing model from the issue text.