Moved code into src folder. Added build for component library.

src/store/websites.ts

@@ -0,0 +1,25 @@
+import { create } from 'zustand';
+import produce from 'immer';
+import { DateRange } from 'lib/types';
+
+const store = create(() => ({}));
+
+export function getWebsiteDateRange(websiteId: string) {
+  return store.getState()?.[websiteId];
+}
+
+export function setWebsiteDateRange(websiteId: string, dateRange: DateRange) {
+  store.setState(
+    produce(state => {
+      if (!state[websiteId]) {
+        state[websiteId] = {};
+      }
+
+      state[websiteId].dateRange = { ...dateRange, modified: Date.now() };
+
+      return state;
+    }),
+  );
+}
+
+export default store;