Add internal wiki pages

Summary:
Ran the wiki migration script on the Flipper_Internals wiki.

Deleted the pages mentioned in https://www.internalfb.com/tasks/?t=81712504
Also deleted hacking-launcher, which is now succeeded by the new "hacking-on-launcher".

Reviewed By: nikoant

Differential Revision: D25613387

fbshipit-source-id: b57b3e20f37b556774d7748477a1dbb7fe844812

website/sidebars.js

@@ -127,6 +127,15 @@ module.exports = {
       'fb/Add-Support-Group-to-Flipper-Support-Form',
       'fb/Help-Updating-Flipper',
       'extending/testing-rn',
+      'fb/Alerts',
+      'fb/bundling',
+      'fb/Certificate-Exchange-Diagram',
+      'fb/Electron-Upgrade',
+      'fb/flipper-analytics',
+      'fb/Navigation-Plugin-Development-Guide',
+      'fb/Oncall-Runbook',
+      'fb/sandcastle',
+      'fb/Star-Ratings',
     ]),
   },
 };