chore: improve code quality and streamline configuration files

- Compact the features object in the devcontainer configuration

Signed-off-by: appleboy <appleboy.tw@gmail.com>

.devcontainer/devcontainer.json

@@ -1,8 +1,7 @@
 {
   "name": "Gitea MCP DevContainer",
   "image": "mcr.microsoft.com/devcontainers/go:1.24-bookworm",
-    "features": {
+  "features": {},
-    },
   "customizations": {
     "vscode": {
       "settings": {},
@@ -16,4 +15,4 @@
       ]
     }
   }
-  }
+}