FEAT(gitea): add gitea Application to apps reposit

- Move gitea Application definition to applications repo
- Add gitea resources (helm-values, vault secrets, runner deployment)
- Update kustomization.yaml to include gitea Application
- This enables ArgoCD to manage gitea with proper Helm chart integration

gitea/kustomization.yaml

@@ -0,0 +1,19 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+resources:
+  # ArgoCD Application (주석 처리: circular dependency 방지)
+  # - argocd/gitea.yaml
+  # Gitea Application은 수동으로 적용: kubectl apply -f gitea/argocd/gitea.yaml
+  
+  # Gitea Runner
+  - deployment.yaml
+  
+  # Vault secrets
+  - vault/gitea-admin-secret.yaml
+  - vault/gitea-postgres-password.yaml
+  - vault/gitea-runner-token.yaml
+  - vault/gitea-minio-credentials.yaml
+  - vault/minio-root-password.yaml
+
+namespace: gitea