Basic discussions forum framework

Adds the basic structure for the Discussions MFE around which future development
will happen.

src/store.js

@@ -0,0 +1,14 @@
+import { configureStore } from '@reduxjs/toolkit';
+import { commentsReducer } from './discussions/comments/data';
+import { courseThreadsReducer } from './discussions/posts/data';
+import { topicsReducer } from './discussions/topics/data';
+
+const store = configureStore({
+  reducer: {
+    topics: topicsReducer,
+    threads: courseThreadsReducer,
+    comments: commentsReducer,
+  },
+});
+
+export default store;