recipe-maintainer: public snapshot (secrets + deployment plans removed, single commit)

Sanitized single-commit public mirror of recipe-maintainer.
- Removed test-ssh/.testenv (live creds); added test-ssh/.testenv.example placeholders.
- Removed plans/ and planned-updates/ (deployment-planning docs) so no client/
  deployment domains appear in the public repo.
- All other secret stores were already gitignored.
- docs.coopcloud.tech retained as a submodule (public upstream).

recipe-info/lichen-markdown/test.md

@@ -0,0 +1,13 @@
+# Test plan
+
+Target URL: `https://lichen-markdown.t1cc.commoninternet.net`
+
+## Automated
+
+- `health_check.py` — HTTP 200 at the root URL
+
+## Manual
+
+- Open the URL and confirm the default lichen-markdown homepage loads
+- Visit `/admin` and confirm a login prompt appears
+- Log in with credentials from `recipe-info/testsecrets/lichen-markdown.t1cc.commoninternet.net` and confirm the CMS editor loads