docs: Convert docs.fp.o/websites/ to publish from this repository
    
    Several changes are condensed into this commit. It takes the base W&A
    team documentation site, converts into a friendly format for this
    repository, and modernizes all the existing content there. For
    posterity's sake, the squashed commit log is below:
    
    Signed-off-by: Justin W. Flory (he/him) [Fedora Project] <jwf@fedoraproject.org>
    
    ---
    
    * gitignore: Add Antora build caches and output directories
    * build.sh: Update from pagure.io/fedora-docs/template
    * antora: Move build scripts to root directory
    * Add "& Apps" to title, set start_path to docs
    	* This tells the Antora playbook to look into the `docs/` directory
    	  for the content to serve.
    * modules: Split instructional content into new "runbook" module
    	* This will be part of a growing compilation of docs and information
    	  about how the Websites & Apps team is run and how we organize
    	  ourselves.
    * runbook: Create an index page and describe role/function of runbook
    * Rewrite index page
    	* This is a near-complete restructure of the index page for the W&A
    	  team. This merges in relevant content and information from the
    	  Sphinx docs `index.rst` file with the current `index.adoc` used
    	  for the team.
    	* I also restructured the opening and tried to update copy with
    	  current information and approaches. Some content was removed if it
    	  was no longer made sense in our current form.
    * runbook: Create dedicated page about team meetings
    * runbook: Add page-aliases to redirect from old URL namespace
    	* Since these pages existed previously, using the `page-aliases`
    	  directive will cause them to redirect to their new location in the
    	  `runbook` module.
    * dev: Create new module from setup documentation
    	* This commit puts together a new module to gather developer
    	  content. For now, this just pulls from the content that was
    	  already published in the root module.
    * dev: Add an index page to developer docs
    * old_docs: Move remaining page from old docs into ROOT module
    * ROOT: Convert old websites_release ReST doc to AsciiDoc
    	* Not publishing it clearly, but keeping it here for future review
    	  by the team to ensure accuracy.
    * ROOT: Add translation doc page to module navigation
    * legal: Update to CC BY-SA 4.0 :heart:
    	* This follows the somewhat-recent decision by Fedora to update its
    	  Creative Common licensing from 3.0 Unported to 4.0.
    * README: Add docs.fp.o/websites/ as a site hosted from this repo