feat: tambah MCP server deploy-stg untuk trigger GitHub workflow

- scripts/mcp-deploy.ts: MCP server dengan 2 tool:
  - publish: trigger publish.yml (build & push image stg)
  - repull: trigger re-pull.yml (redeploy stack di Portainer)
- .mcp.json: registrasi server dengan env GH_TOKEN, STACK_NAME, BASE_URL

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.mcp.json

@@ -0,0 +1,14 @@
+{
+  "mcpServers": {
+    "deploy-stg": {
+      "type": "stdio",
+      "command": "bun",
+      "args": ["scripts/mcp-deploy.ts"],
+      "env": {
+        "GH_TOKEN": "",
+        "STACK_NAME": "",
+        "BASE_URL": ""
+      }
+    }
+  }
+}