Add bind-operator repository

Declares the bind-operator repo so Gitea provisions it for the new
Kubernetes operator that manages BIND9 DNS clusters.

- add config/git.unkin.net/unkin/repository/bind-operator.yaml with
  main as default branch, squash merge, delete-branch-after-merge, and
  branch protection requiring the pre-commit/test/build CI checks

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

@@ -0,0 +1,14 @@
+description: "Kubernetes operator for managing BIND9 DNS clusters, zones, views, and TSIG keys"
+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_teams:
+      - "Owners"