FEAT(k8s): add YAML manager agent

Major additions:
- New Groq agent: YAML Manager
  - Generates Kubernetes YAML files (Deployment, Service, Ingress)
  - Organizes YAMLs in folder structure by application
  - Applies YAMLs directly to cluster using Python K8s client
  - Shows Git file changes in UI with diff display

- YAML Management MCP Tools:
  - yaml_create_deployment: Create Deployment YAML
  - yaml_create_service: Create Service YAML
  - yaml_create_ingress: Create Ingress YAML with TLS
  - yaml_apply_to_cluster: Apply YAMLs to K8s cluster
  - git_show_file_changes: Display Git changes in UI

- RBAC Permissions:
  - mas-writer ClusterRole: Write permissions for Groq agents
  - Create/update/delete permissions for core K8s resources
  - Namespace and ArgoCD Application management
  - mas ServiceAccount has both read (viewer) and write (writer) roles

- UI Updates:
  - Added YAML Manager to agent list
  - Updated agent icons and names (Qwen → Groq)
  - Display file changes with syntax highlighting

- Workflow Integration:
  - YAML Manager node in LangGraph workflow
  - Orchestrator routes YAML/K8s keywords to YAML Manager
  - Tool binding for YAML-specific operations

Dependencies:
- Added PyYAML==6.0.2 for YAML generation

deploy/k8s/overlays/prod/kustomization.yaml

@@ -16,5 +16,5 @@ commonLabels:
 # 이미지 태그 설정 (ArgoCD Image Updater가 자동으로 업데이트)
 images:
   - name: gitea0213.kro.kr/bluemayne/mas
-    newTag: main-sha-22b0840afde85b864df82a5c9408da8c78e28195
+    newTag: main-sha-c7bd76b5a29025a1fe57e10fc44fd6afd37fd947