site generator: commands/*.md with front matter -> k8s/site/

- build/build.mjs: one-file-per-command content (filename = command,
  underscores = spaces; help/suggestion/params/prefix/text/hidden in
  front matter; ${args} ${date} ${time} ${ls} ${help} resolved at runtime)
- generates index.html (banner + chips), commands.json (the single data
  source), hello.txt for curl, style.css via tailwind v4
- src/site.js is now dispatch-only over commands.json; typewriter kept
- src/telnet.py: stdlib telnet shell sharing commands.json
- k8s: python telnet sidecar in the pod + LoadBalancer service 23->2323
- .gitea/workflows/site.yml fails CI when k8s/site/ is not the built output

k8s/kustomization.yaml

@@ -10,9 +10,13 @@ configMapGenerator:
       - site/index.html
       - site/style.css
       - site/site.js
+      - site/commands.json
       - site/hello.txt
       - site/favicon.svg
       - site/robots.txt
   - name: config
     files:
       - site/nginx.conf
+  - name: telnet
+    files:
+      - site/telnet.py