Is your feature request related to a problem or challenge? Please describe what you are trying to do.
It would be nice to publish to the datafusion website the supported functions. I currently use AWS athena / presto and frequently reference their documentation (https://prestodb.io/docs/current/functions.html) on supported functions. I am looking for datafusion to have something similar.

Describe the solution you'd like
Documentation of supported functions added to datafusion website

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.