Add room description.

data/rooms.ts

@@ -1,3 +1,8 @@
-export const hall = {
+import { GameData } from "./data.ts";
+
+export const hall: GameData = {
+	description:
+		"You are standing in a big hall. There's lots of nooks, crannies, and" +
+		"room for general testing. Aw yeah... sweet testing!",
 	items: [{ name: "flashlight" }],
 };