This replaces all asset links to use the new public S3 bucket. It also
upgrades several packages:
- Simple Icons v10.2.0 to v13.9.0
- Tabler Icons v2.47.0 to v3.14.0
- HightightJS v11.9.0 to v11.10.0
- Monaspace v1.000 to v1.101
- Mona Sans for paragraphs and default text.
- Hubot Sans for headings and titles.
- Monaspace for code and other monospace text.
Removed CascadiaCode and Ubuntu fonts.
- Added fonts as static assets. We no longer depend the client's system
to have the fonts installed.
- Moved site wide monospace and sans-serif font families to a global variable.