packages/core: add consumer side to AlertApi and use for AlertDialog + friends

packages/app/src/App.tsx

@@ -19,7 +19,7 @@ import React, { FC } from 'react';
 import { BrowserRouter as Router } from 'react-router-dom';
 import Root from './components/Root';
 import * as plugins from './plugins';
-import apis, { alertApiForwarder } from './apis';
+import apis from './apis';
 
 const app = createApp({
   apis,
@@ -31,7 +31,7 @@ const AppComponent = app.getRootComponent();
 
 const App: FC<{}> = () => (
   <AppProvider>
-    <AlertDisplay forwarder={alertApiForwarder} />
+    <AlertDisplay />
     <OAuthRequestDialog />
     <Router>
       <Root>