move examples into examples

Author: josh-heyer

advocacy_docs/playground/1/01_examples/index.mdx

@@ -6,6 +6,10 @@ redirects:
 
 navigation:
   - code-blocks
+  - icons
+  - tabs
+  - summary
+  - expression-replacement
 ---
 
 Here are some of the most common things you'll need to use for content. For a full list, go to this [cheatsheet](https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet). Fair warning: not all of those examples will work here.