Most notably, the list of available themes didn't match (in completeness or name) the examples provided at the end of the file (nor the listing I found in /packages/cli/src/ui/themes)
This content looks like it is better hosted in the themes.md doc.
This is as close as possible to an as-is cut-paste from one file to the other, with the goal of minimizing fine-grained review in this particular PR. I'll take another pass through themes.md specifically to improve the moved content in a follow up PR
