Improved drop-down filters for search

[khemarato]

Right now, search supports type filters via a dropdown and other filters via text (e.g. "+is:music"). It would be nice to add:

1. Subcats ("is:poetry", etc) (can maybe be added to the existing dropdown?)
2. Authors (maybe a typeahead dropdown pulling from the _authors collection? Handling hyphens in the filter query will be tricky)
3. Translator (will have to pull this list by looking at the _authors that actually have translated _content. Perhaps can be combined with the author filter above somehow)
4. Rating (e.g. "status: featured" content only) This data would have to be added to the search index first, and then given a dropdown.

[ColmBhandal]

FYI started working on this: https://github.com/ColmBhandal/buddhist-uni.github.io/tree/feature/34-drop-down-filters

[ColmBhandal]

However, looks like the build isn't configured for forks. So I'm not sure how to test my changes. Please advise...

[khemarato]

Oh! Nice 🙂 To build locally, try:

npm ci
bash scripts/install-deps.bash
bundle install
bundle exec jekyll serve -tI

[khemarato]

Thanks for landing the first PR for this, @ColmBhandal! 🥳 I've updated the description with what's been done and what there's left to do.