[FEATURE]: Support PostgreSQL XML Datatype in drizzle

### Feature hasn't been suggested before.

- [x] I have verified this feature I'm about to request hasn't been suggested before.

### Describe the enhancement you want to request

I was attempting to write code to create new PostgreSQL table with the XML datatype in drizzle per my project requirements and discovered there's no support in drizzle for this.
Any thoughts on adding support for PostgreSQL XML datatype and query functions?
https://www.postgresql.org/docs/current/datatype-xml.html

I might do some digging and pick this up myself if I get time, otherwise I'll just be using default pg functions to deal with XML outside of drizzle for now.