add sphinx-copybutton configurations to exclude prompts

[mosc9575]

• closes DOC: Add automatic exclusion of prompts from the copies using sphinx-copybutton #59369

[mroeschke]

The preferred solution would be to add back sphinx-togglepromt so users have the choice whether to copy the prompt or not

[mosc9575]

It is easy to combine the extensions sphinx_copybutton and sphinx_toggleprompt, but sphinx_toggleprompt doesn't support the ipython layout. See a minimal example I made with the code from the beginners section.

If the regular expression from sphinx_copybutton isn't activated, it is not possible to copy the code from the first block to the clipboard without the output lines. This is not user friendly.

Combining these two extensions for a supported layout will result in two clicks for the user to copy the code. And in my humble opinion this is one click to much.

[mosc9575]

@mroeschke Could you please give me some feedback to the current version. Otherwise I am about to close this PR, because it is out of my personal scope.