Move App into shell dir. Decouple ContextProviders. Improved type coverage for reducers

packages/app/shell/App.tsx

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+import React from 'react';
+import { hot } from 'react-hot-loader/root';
+import { Route, Switch } from 'react-router-dom';
+import { Store } from 'app/reducers';
+import AuthFlowRoute from 'app/containers/AuthFlowRoute';
+import RootPage from 'app/pages/root/RootPage';
+import SuccessOauthPage from 'app/pages/auth/SuccessOauthPage';
+
+import ContextProvider from './ContextProvider';
+
+const App = ({ store, history }: { store: Store; history: any }) => (
+  <ContextProvider store={store} history={history}>
+    <Switch>
+      <Route path="/oauth2/code/success" component={SuccessOauthPage} />
+      <AuthFlowRoute
+        path="/oauth2/:version(v\d+)/:clientId?"
+        component={() => null}
+      />
+      <Route path="/" component={RootPage} />
+    </Switch>
+  </ContextProvider>
+);
+
+export default hot(App);

packages/app/shell/ContextProvider.tsx

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+import React from 'react';
+import { Provider as ReduxProvider } from 'react-redux';
+import { Router } from 'react-router-dom';
+import { IntlProvider } from 'app/components/i18n';
+import { Store } from 'app/reducers';
+
+function ContextProvider({
+  children,
+  store,
+  history,
+}: {
+  children: React.ReactNode;
+  store: Store;
+  history: any;
+}) {
+  return (
+    <ReduxProvider store={store}>
+      <IntlProvider>
+        <Router history={history}>{children}</Router>
+      </IntlProvider>
+    </ReduxProvider>
+  );
+}
+
+export default ContextProvider;

packages/app/shell/index.ts

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+export { default } from './App';
+export { default as ContextProvider } from './ContextProvider';