update plugin's package.json

Summary:
For all plugins:
- move static fields `title`, `id` and `icon` to `package.json`
- adds "bugs" field for all plugins containing links to support groups/oncalls.

Reviewed By: priteshrnandgaonkar

Differential Revision: D13417286

fbshipit-source-id: 7b341176915f3ed7b473b95c1d879f21d7d634ef

src/plugins/layout/index.js

@@ -188,10 +188,6 @@ class LayoutSearchInput extends Component<
 }
 
 export default class Layout extends FlipperPlugin<InspectorState> {
-  static title = 'Layout';
-  static id = 'Inspector';
-  static icon = 'target';
-
   state = {
     elements: {},
     initialised: false,