Complete site overhaul (DREAM).

[jholdstock]

Overhauling the entire site as per approved proposal D.R.E.A.M. 2: Dream Harder.

Summary of site changes

• Complete overhaul of theme and style.
• Updated messaging using strong words and simple language.
• Support and Publication sections added to /community.
• Removed /chat subpage, URL redirected to http://chat.decred.org.
• Removed /brief, /sustainable, /adaptable, /security, and /history subpages.
• Removed legacy stakepools from /vsp.

Technical details

• Site is implemented as far as possible without JavaScript. JS is used for:
  • Top navigation bar on mobile
  • Populating VSP table
  • OS specific download links on homepage
• Previous site was built on drag-and-drop editor Webflow. The Webflow CSS has been replaced with Bootstrap.
• All site CSS (including Bootstrap) is compiled from SCSS source.
• New site does not contain any videos or Lottie animations, so all css/js for those has been removed.
• apps.yml and current_release.yml and links.yml consolidated to remove duplcation. All wallet links and versions now reside in one file wallets.yml.
• SourceSansPro font replaced with a mixture of Poppins and Inter. SourceCodePro remains the monospace font.

Follow up work

• Content from /brief and /history to be moved to dcrdocs. When the new content is there, add redirects to dcrweb.
  • decred/dcrdocs#1206

  • 1057

• /vsp, /brand, /press were not updated and need some attention to fit the new style.
• /?c=dc and /?c=gsd endpoints on dcrwebapi can be removed.
• Many hosted files have been removed from /static but there are still more which might be removed (eg. pdfs in /static/media).
• Clean up translation files:
  • Ensure all strings are used.
  • Remove any English strings from non-English files.
  • Remove unused translations?

Closes #890, Closes #1027, Closes #961, Closes #782, Closes #835, Closes #674