Closes#1434
### Changes
#### Developer
- Adds the K3S playbook guide to the navigation
- Adds note about restarting MKDocs when adding new icons
- Adds note about concise language to the styleguide ([see previous
discussion](https://github.com/webrecorder/browsertrix-cloud/pull/1394#discussion_r1402666872))
- Adds a note about noun usage to the styleguide
#### User guide
- Adds tables for archived item and workflow statuses
- Adds custom styles for displaying statuses with their icons like we do
in the app
- Fixes capitalization issues
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Co-authored-by: Tessa Walsh <tessa@bitarchivist.net>
Co-authored-by: sua yoo <sua@webrecorder.org>
* Revert docs body font to Inter
- Adds Inter V4 Beta variable font files
- Main docs title in the nav retains Recursive as its typeface
- Updates text styling to use app-aligned typography
- Updates code blocks, now with distinct borders!
- Cleans up code blocks, moves like parts together
* font-weight fix
- Aligns with app font weight for titles
- Nav bar text is now 20% higher opacity, hover state also differentiated with weight
- In-body links are now underlined
- Lightened BG colour and darkened link colour — now achieves an APCA score of 84!
- Adds a custom stylesheet & brand colours
- Adds Recursive as the code font
- Adds repo info to the nav bar
- Adds auto tracking ID links for deep linking to sections as users scroll the page
- Index pages are now a part of their section as determined by their H1
- Removes mkdocs info from future footer
