chore: fetch to get in redux thunks files name

redux/thunks/getLast20MessagesThunk.ts

@@ -0,0 +1,13 @@
+// /redux/thunks/getLast20MessagesThunk.ts
+import { createAsyncThunk } from "@reduxjs/toolkit";
+import { fetchLast20MessagesFromWindow } from "../../services/fetchLast20MessagesService";
+import { setLast20Messages } from "../slices/last20MessagesSlice";
+
+export const getLast20MessagesThunk = createAsyncThunk(
+  "last20Messages/fetchLast20Messages",
+  async (_, { dispatch }) => {
+    const messages = await fetchLast20MessagesFromWindow();
+    dispatch(setLast20Messages(messages));
+    return messages;
+  }
+);