patch updates

[2bndy5]

• Adds github actions workflows to dependabot config.
• Fixes logic in test and docs/conf.py to reduce usage of GH REST API. Previous attempt was flawed which led to significant drop in code coverage.
• cache docs fonts in CI runners. Does not apply to fonts used by cards though.
• Update/fix RTD config.

[codecov-commenter]

Codecov Report

Merging #3 (ed14317) into main (2808d7a) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main       #3   +/-   ##
=======================================
  Coverage   87.90%   87.90%           
=======================================
  Files          14       14           
  Lines        1100     1100           
=======================================
  Hits          967      967           
  Misses        133      133