chore: initialize typing-chud project with Unified API structure

- Copy vim-snake structure stripped of game-specific logic
- Remove finalScore calculation (raw data only)
- Setup example app with keybinding state management
- Empty board renders and waits for game logic

example/src/useKeyBindings.ts

@@ -0,0 +1,38 @@
+import { useEffect } from "react";
+import type { GameManager } from "../../src";
+
+export const useKeyBindings = (gameManager: GameManager) => {
+  const { gameStatus, renderBoard, startGame, quitGame, clearKeyLog } = gameManager;
+
+  useEffect(() => {
+    const handler = (ev: KeyboardEvent) => {
+      // start game
+      if (ev.code === "Space") {
+        if (["waiting", "game-over", "game-won"].includes(gameStatus)) {
+          clearKeyLog();
+          renderBoard();
+          if (gameStatus === "game-over" || gameStatus === "game-won") {
+            quitGame();
+            setTimeout(() => startGame(), 0);
+          } else {
+            startGame();
+          }
+          return;
+        }
+      }
+
+      // ignore other keys while waiting
+      if (gameStatus === "waiting") return;
+
+      // quit
+      if (ev.key === "q" || ev.key === "Q") {
+        quitGame();
+        return;
+      }
+    };
+
+    window.addEventListener("keydown", handler);
+    return () => window.removeEventListener("keydown", handler);
+  }, [gameStatus]);
+};
+