* Adding Postgres for the doc and index store
* Adding documentation. Rename postgres database local->simple. Postgres storage dependencies
* Update documentation for postgres storage
* Renaming feature to nodestore
* update docstore -> nodestore in doc
* missed some docstore changes in doc
* Updated poetry.lock
* Formatting updates to pass ruff/black checks
* Correction to unreachable code!
* Format adjustment to pass black test
* Adjust extra inclusion name for vector pg
* extra dep change for pg vector
* storage-postgres -> storage-nodestore-postgres
* Hash change on poetry lock
