[REQUEST] Matching/Validation lambda function for prompt input

[WuerfelDev]

Have you checked the issues for a similar suggestions?

#2938 #1845 #1886

How would you improve Rich?

Many people want to match/validate the prompt input in other ways than predefined. While it's possible to create a subclass, it would be a lot easier to just pass in a lambda function as optional parameter that replaces the default check_choice.

What problem does it solve for you?

Primarily a documented way to change the validation. It's way easier because you don't need no subclass
In my case it solves case insensitive matching and fuzzy matching.

[github-actions]

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