chore: move all components into Components dir with pascal case (#934)

app/assets/javascripts/components/Preferences/panes/account/index.ts

@@ -0,0 +1,6 @@
+export { Subscription } from './subscription/Subscription';
+export { Sync } from './Sync';
+export { Credentials } from './Credentials';
+export { SignOutWrapper } from './SignOutView';
+export { Authentication } from './Authentication';
+export { Advanced } from './Advanced';