Missing documentation for using PostGIS

Documentation Issue

The documentation states the the point field type can be used, except for when using SQLite databases. However there is no documentation on what is needed in order for this to work when using Postgres/PostGIS.

Just a little section about PostGIS in the Postgres database docs, which mentions the following config and which is referenced in the point field docs would already be very helpful.

// payload.config.ts
db: postgresAdapter({
  extensions: ['postgis']
}),