* docs: streamline quickstart
* feat(docs): simplify quickstart code-block styling
Remove the fake terminal chrome (traffic lights + zsh header) and language
pill from bash blocks, and the teal left-accent from output blocks. Bash
fences now render as minimal cards; text fences route to a muted "output"
preview. Make detectLanguage recursive and enable addLanguageClass in
source.config.ts so Shiki tokens carry through to the renderer. Switch
Shiki themes to min-light / github-dark and disable monospace ligatures so
flag pairs like --agents keep a visible space.
* fix(docs): restore quickstart CI snippets
