Reorder extending sidebar

Summary:
JS pages first, then client pages.
Would be nice if we had some sort of separator, but I think you can only have two levels.

Reviewed By: danielbuechele

Differential Revision: D15198312

fbshipit-source-id: 6c9f8d8775f513a55c256366448faed13b671767

docs/extending/send-data.md

@@ -1,6 +1,6 @@
 ---
 id: send-data
-title: Providing data to plugins
+title: Providing Data to Plugins
 ---
 
 It is often useful to get an instance of a Flipper plugin to send data to it. Flipper makes this simple with built-in support.

website/i18n/en.json

@@ -43,7 +43,7 @@
         "title": "Searching and Filtering"
       },
       "extending/send-data": {
-        "title": "Providing data to plugins"
+        "title": "Providing Data to Plugins"
       },
       "extending/styling-components": {
         "title": "Styling Components"

website/sidebars.json

@@ -36,9 +36,9 @@
       "extending/create-table-plugin",
       "extending/ui-components",
       "extending/styling-components",
+      "extending/search-and-filter",
       "extending/create-plugin",
       "extending/send-data",
-      "extending/search-and-filter",
       "extending/error-handling",
       "extending/testing"
     ],