c-ares.org template language fcpp -> Jekyll

[Brad House]

As of today, the c-ares.org website is being rendered via Jekyll rather 
than the esoteric FCPP and Markdown external utilities. This should 
allow us to more easily modify the site in the future.  There are 
multiple Jekyll themes available for future customization, and it uses a 
better known and feature-rich templating language (Liquid).  The 
manpages are still converted to html by roffit 
(https://github.com/bagder/roffit).

I'm no web designer, its still just as basic a site as the original, but 
it does appear to be more responsive due to the default Jekyll minima 
theme in use.

If there are any volunteers that would like to customize the design of 
the site, we'd love the help!  Some basic information on building and 
testing the site locally are in 
https://github.com/c-ares/c-ares.github.io/blob/main/README.md

Thanks!

-Brad