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/gitea/test.md

@@ -0,0 +1,19 @@
+# Gitea Tests
+
+## Target
+
+- **URL:** https://gitea.<DOMAIN_SUFFIX>
+
+## Automated Checks
+
+Run the scripts in `tests/` to perform automated testing:
+
+- `health_check.py` — Confirms the instance is reachable and returns HTTP 200.
+- `git_push.py` — Creates a repo via the API, clones it, pushes a commit, verifies the commit landed via the API, then deletes the repo. Requires admin credentials in `recipe-info/testsecrets/<domain>`.
+
+## Manual Verification
+
+1. Open https://gitea.<DOMAIN_SUFFIX> in a browser.
+2. Confirm the Gitea landing page loads without errors.
+3. Log in as the admin user created via `admin user create`.
+4. Create a test repository and push a commit to verify git operations work.