CI: Add README.md and CODEOWNERS

.gitea/CODEOWNERS

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+.woodpecker.{yml,yaml} @https/CI
+.gitea/CODEOWNERS @https/CI
+README.md @https/CI

README.md

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+# Contributing
+
+## Branch Protection
+- **`main` branch is protected** — direct pushes are disabled.
+- All changes must go through **Merge Requests (MRs)**.
+- MRs require approval from code owners before merging.
+
+## CI/CD
+- Deployment is automated via **Woodpecker CI**.
+- Pipeline triggers on every push to `main` after merge.
+- Configuration: `.woodpecker.yml`
+
+## Workflow
+1. Create a feature branch from `main`
+2. Make changes and push (put web content in `/public`)
+3. Open a Merge Request
+4. Wait for CI checks + code owner review
+5. Merge when approved
+
+## Code Owners
+See `.gitea/CODEOWNERS` for responsible maintainers.