initial playable functionality

TODO: restructure
- this is mostly a copy-paste from the old game and socket handlers

client/src/types.ts

@@ -0,0 +1,33 @@
+import type { Game, User } from "@chessu/types";
+import type { Chess } from "chess.js";
+
+export interface Lobby extends Game {
+    actualGame: Chess;
+    side: "b" | "w" | "s";
+}
+
+export interface CustomSquares {
+    options: { [square: string]: { background: string; borderRadius?: string } };
+    lastMove: { [square: string]: { background: string } };
+    rightClicked: { [square: string]: { backgroundColor: string } | undefined };
+    check: { [square: string]: { background: string; borderRadius?: string } };
+}
+
+export type Action =
+    | {
+          type: "updateLobby";
+          payload: Partial<Lobby>;
+      }
+    | {
+          type: "setSide";
+          payload: Lobby["side"];
+      }
+    | {
+          type: "setGame";
+          payload: Chess;
+      };
+
+export interface Message {
+    author: User;
+    message: string;
+}