♻️ Create exceptions module and TyperException base class

[svlandeg]

Pull Request

Discussion: #1832

Description

Continuing from the original Click vendoring, this PR introduces a new base class TyperException that all other exception classes inherit from. This is to replace a check for ClickException (which some users may want to do, cf discusssion thread) which is currently in the private module _click and shouldn't be used/imported directly. The "old" Click exception hierarchy will be refactored in the near future and shouldn't be used directly either.

Abort and Exit have always been part of the public Typer API and as such they are moved into the new Typer module.

AI Disclaimer

No AI used, just good old fashioned human communication & thinking. Refreshing 😎

Checklist

• This PR links to a GitHub Discussion for the proposed code change.
• Coverage stays at 100%.
• The documentation explains the change if needed.

[tiangolo]

Nice, thank you! 🚀

This will be available in Typer 0.27.2 in the next few hours.