The manual lacks a search #157
Description
The manual on Read the Docs doesn't seem to have a search. Investigate.
https://dnd-srd-sphinx.readthedocs.io/en/latest/index.html has a search. I suspect this is to do with our custom theme. We may be able to inherit the search from Read the Docs themes.
Originally posted by @rptb1 in #141 (comment)