Revert "Move app into app directory"

This reverts commit 5c53902caf.

web/src/components/PartReactionsCell/PartReactionsCell.stories.js

@@ -0,0 +1,20 @@
+import { Loading, Empty, Failure, Success } from './PartReactionsCell'
+import { standard } from './PartReactionsCell.mock'
+
+export const loading = () => {
+  return Loading ? <Loading /> : null
+}
+
+export const empty = () => {
+  return Empty ? <Empty /> : null
+}
+
+export const failure = () => {
+  return Failure ? <Failure error={new Error('Oh no')} /> : null
+}
+
+export const success = () => {
+  return Success ? <Success {...standard()} /> : null
+}
+
+export default { title: 'Cells/PartReactionsCell' }