fix(docs): image style error (#267)

* feat(docs): add composite nodes docs

* fix(docs): style

apps/docs/global.less

@@ -11,8 +11,12 @@
   height: 100% !important;
 }
 
-.medium-zoom-image {
-  width: 100%;
+//.medium-zoom-image {
+//  width: 100%;
+//}
+
+.gedit-playground .medium-zoom-image {
+  pointer-events: none;
 }
 
 .rs-table {

apps/docs/src/zh/guide/advanced/fixed-layout/composite-nodes.mdx

@@ -2,7 +2,6 @@
 
 复合节点由多个节点组合，并支持自定义线条，如 分支节点、Loop 节点、TryCatch 节点:
 
-
 ## 使用
 
 ```ts pure title="node-registries.ts"