[Update][Ease of Use] Fix Types

# Fix Types

Types are currently broken in many places throughout the project. Some of these, like `CollectionMetadata` have been broken for over a year. A good type system improves code correctness and hence development velocity.

We must have 𝔬𝔯𝔡𝔢𝔯.

## API Design

N/A

## [Complexity] Subtask
- [Med] Break up the very long https://github.com/chroma-core/chroma/blob/main/chromadb/api/types.py and extract validators as appropriate.
- [Med] Remove all generic #type: ignores and have MyPi pass
- [Low] Add type checking before merge on PRs so this never happens again