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
---------
Co-authored-by: Tessa Walsh <tessa@bitarchivist.net>
Co-authored-by: sua yoo <sua@webrecorder.org>
