Add a reference page listing all data types and showing how to specify schemas

[wjones127]

We want to document all data types we have that we support. Mostly this is Arrow types, but there are four important types we should make sure to include and might need special instructions:

1. FixedSizeList of floats or uint8 are what we represent vectors (like embeddings as)
2. UUIDs
3. We have a JSON type that matches with the JSON columns
4. We have a Blob column that that allows efficient access for large values.
   The later two are treated as extension types.

There are some types we shouldn't emphasize because we don't support them well right now. This includes:

• Union
• Map