up to date examples + automatically regenerated pages

[gregsadetsky]

hey,

thanks for this repo!

I went ahead and recreated this examples-conversion-to-html in another repo

the biggest change is that the publishing is now automated using github pages and the conversion is run once a day using github actions (all done in this file)

i.e. any fix/update to an example Tantivy file (in this directory) will be picked up within 24 hours and published.

I also made a cheeky index.html page :-)

the web output is here -- https://gregsadetsky.github.io/tantivy-examples-docs/

cheers!

p.s. feel free to take the github actions/workflow from my repo!