Request: H3 Function Example

[KoalaGeo]

Hi,

The Hexagon function example in the documentation is really useful, however I'd really appreciate an example using the standard H3 hierarchical hexagonal geospatial indexing system.

https://github.com/zachasme/h3-pg/tree/main
https://blog.rustprooflabs.com/2022/04/postgis-h3-intro

Is this something you think other users would benefit from and you'd considering adding?

[dr-jts]

This is too complex for a pg_tileserv example, and wouldn't demonstrate anything extra about pg_tileserv.

However, it would make a great blog post!