feat(docs): Add "collapsed" property to _category_.json

Add a new property called "collapsed" to the _category_.json file in the docs/basics directory. This property is set to false and will be used to control the initial state of category sections in the documentation.

docs/basics/_category_.json

@@ -4,5 +4,6 @@
   "link": {
     "type": "generated-index",
     "description": "Gain a foundational understanding of Volvox.Apollo's core principles and learn to effectively utilize them in your integrations."
-  }
+  },
+  "collapsed": false
 }