feat: impliment NullCache

[LordOfPolls]

What type of pull request is this?

• [x] Non-breaking code change
• [ ] Breaking code change
• [ ] Documentation change/addition
• [ ] Tests change

Description

Implements a NullCache object. This is effectively a cache that is used for a completely disabled cache. This cache will not store anything, and will always return None. This is done to aid in debugging, and ease of cache disabling. The existing solution would simply create a TTLCache that will discard data constantly, which isn't overly user friendly or performant

Changes

• Implement NullCache
• Add NullCache to create_cache
• Add NullCache detection to sanity checks
• Add NullCache to debug ext
• Minor refactor of debug ext caching suite

Checklist

• [x] I've formatted my code with Black
• [x] I've ensured my code works on Python 3.10.x
• [x] I've tested my code