FEAT(gitea): add self-contained Gitea deployment

- Replace GitHub redirect with actual Gitea server
- SQLite database (no CNPG dependency)
- local-path StorageClass (no Longhorn dependency)
- Manual secret creation (no Vault dependency)
- Ingress at gitea0213.kro.kr

gitea/kustomization.yaml

@@ -1,5 +1,4 @@
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
-resources:
-- redirect.yaml
-namespace: gitea
+# Secret is created manually via kubectl
+resources: []