docs: add collapsed (#564)

apps/docs/src/en/guide/advanced/_meta.json

@@ -2,19 +2,22 @@
   {
     "type": "dir",
     "name": "free-layout",
-    "label": "Free Layout"
+    "label": "Free Layout",
+    "collapsed": true
   },
   {
     "type": "dir",
     "name": "fixed-layout",
-    "label": "Fixed Layout"
+    "label": "Fixed Layout",
+    "collapsed": true
   },
   "form",
   "without-form",
   {
     "type": "dir",
     "name": "variable",
-    "label": "Variable"
+    "label": "Variable",
+    "collapsed": true
   },
   "zoom-scroll",
   "history",

apps/docs/src/zh/guide/advanced/_meta.json

@@ -2,19 +2,22 @@
   {
     "type": "dir",
     "name": "free-layout",
-    "label": "自由布局"
+    "label": "自由布局",
+    "collapsed": true
   },
   {
     "type": "dir",
     "name": "fixed-layout",
-    "label": "固定布局"
+    "label": "固定布局",
+    "collapsed": true
   },
   "form",
   "without-form",
   {
     "type": "dir",
     "name": "variable",
-    "label": "变量"
+    "label": "变量",
+    "collapsed": true
   },
   "zoom-scroll",
   "history",