git: add autobackup-operator repository

Provision the Gitea repo for the autobackup-operator, a Kubernetes
operator that creates S3 buckets and backup schedules from
backups.unkin.net/* annotations on PVCs and CNPG clusters. Matches the
convention of sibling operator repos (private=false, squash merges,
main branch protection with pre-commit/test/build checks).

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

@@ -0,0 +1,16 @@
+description: "Kubernetes operator that provisions S3 buckets and backup schedules from backups.unkin.net/* annotations on PVCs and CNPG clusters"
+private: false
+default_branch: "main"
+default_delete_branch_after_merge: true
+default_merge_style: "squash"
+branch_protection:
+  - rule_name: "main"
+    merge_whitelist_teams:
+      - "Owners"
+    enable_push: false
+    status_check_contexts:
+      - "ci/woodpecker/pr/pre-commit"
+      - "ci/woodpecker/pr/test"
+      - "ci/woodpecker/pr/build"
+    approval_whitelist_users:
+      - "benvin"