feat: Add Nanaxe server with Docker, GitHub Actions CI/CD, and auto-deployment

- Add complete server infrastructure with Gitea, API, PostgreSQL
- Implement Obsidian-compatible markdown mindmap converter
- Add Flutter service for server synchronization
- Configure GitHub Actions for automated build and deploy
- Add production docker-compose with health checks
- Include VPS setup and deployment scripts
- Add comprehensive deployment documentation

.qwen/settings.json

@@ -0,0 +1,15 @@
+{
+  "permissions": {
+    "allow": [
+      "Bash(flutter *)",
+      "Bash(dart *)",
+      "Bash(taskkill *)",
+      "Bash(select-object *)",
+      "Bash(findstr *)",
+      "Bash(dir *)",
+      "Bash(select-string *)",
+      "Bash(timeout *)"
+    ]
+  },
+  "$version": 3
+}