Large update for all components

reorganization, linting, updating file imports, consolidation
warning: there will be errors in this commit
todo: update webpack, add missing styles, scss files, consolidate the rest of components within features/*

app/javascript/gabsocial/components/panel/index.js

@@ -0,0 +1,9 @@
+import SignUpPanel from './sign_up_panel';
+import TrendsPanel from './trends_panel';
+import WhoToFollowPanel from './who_to_follow_panel';
+
+export {
+  SignUpPanel,
+  TrendsPanel,
+  WhoToFollowPanel,
+}