feat: add match3d 3d runtime experiment

src/components/match3d-runtime/Match3DRuntimeShell.test.tsx

@@ -1,6 +1,7 @@
 /* @vitest-environment jsdom */
 
 import { fireEvent, render, screen, waitFor } from '@testing-library/react';
+import { useEffect } from 'react';
 import { expect, test, vi } from 'vitest';
 
 import type {
@@ -13,6 +14,15 @@ import {
 } from '../../services/match3d-runtime';
 import { Match3DRuntimeShell } from './Match3DRuntimeShell';
 
+vi.mock('./Match3DPhysicsBoard', () => ({
+  Match3DPhysicsBoard: ({ onFallback }: { onFallback: () => void }) => {
+    useEffect(() => {
+      onFallback();
+    }, [onFallback]);
+    return <div data-testid="match3d-physics-board-fallback" />;
+  },
+}));
+
 function renderRuntime(run: Match3DRunSnapshot) {
   let currentRun = run;
   let authorityRun = run;