Add Redux and reducers.

Load i18n files and add dayjs.

src/redux/State.tsx

@@ -0,0 +1,32 @@
+import { store } from ".";
+import localForage from "localforage";
+import { Provider } from 'react-redux';
+import { Children } from "../types/Preact";
+import { useEffect, useState } from "preact/hooks";
+
+async function loadState() {
+    const state = await localForage.getItem("state");
+    if (state) {
+        store.dispatch({ type: "__INIT", state });
+    }
+}
+
+interface Props {
+    children: Children
+}
+
+export default function State(props: Props) {
+    const [loaded, setLoaded] = useState(false);
+
+    useEffect(() => {
+        loadState().then(() => setLoaded(true));
+    }, []);
+
+    if (!loaded) return null;
+    
+    return (
+        <Provider store={store}>
+            { props.children }
+        </Provider>
+    )
+}