feat: add project introduction

Author: ifyour

package.json

@@ -2,7 +2,7 @@
   "$schema": "https://www.raycast.com/schemas/extension.json",
   "name": "code-var",
   "title": "CodeVar",
-  "description": "Variable Naming Wizard",
+  "description": "CodeVar is a variable naming tool for Raycast extensions powered by OpenAI's GPT-3.",
   "icon": "command-icon.png",
   "author": "ifyour",
   "categories": [
@@ -13,7 +13,7 @@
     {
       "name": "index",
       "title": "CodeVar",
-      "description": "Variable Naming Wizard",
+      "description": "CodeVar is a variable naming tool for Raycast extensions powered by OpenAI's GPT-3.",
       "mode": "view"
     }
   ],