Add cephrgw-operator repository

The cephrgw-operator provisions Ceph RGW (S3) buckets and access keys from
Kubernetes CRDs via the Ceph manager dashboard API, and needs a Gitea repo
to host its code and run Woodpecker CI.

- Add config/git.unkin.net/unkin/repository/cephrgw-operator.yaml with the
  standard public-repo settings (squash merge, delete branch on merge) and
  main branch protection requiring the pre-commit/test/build PR checks.

config/git.unkin.net/unkin/repository/cephrgw-operator.yaml

@@ -0,0 +1,14 @@
+description: "Kubernetes operator that provisions Ceph RGW (S3) buckets and access keys (RW/RO) from CRDs via the Ceph manager dashboard API"
+private: false
+default_branch: "main"
+default_delete_branch_after_merge: true
+default_merge_style: "squash"
+branch_protection:
+  - rule_name: "main"
+    enable_push: false
+    status_check_contexts:
+      - "ci/woodpecker/pr/pre-commit"
+      - "ci/woodpecker/pr/test"
+      - "ci/woodpecker/pr/build"
+    approval_whitelist_users:
+      - "benvin"