Implement basic optimizeDeps() that returns default options

packages/vite/src/optimize-deps.ts

@@ -0,0 +1,10 @@
+export interface OptimizeDeps {
+  exclude?: string[];
+  [key: string]: unknown;
+}
+
+export function optimizeDeps(): OptimizeDeps {
+  return {
+    exclude: ['@embroider/macros'],
+  };
+}

packages/vite/tests/optimize-deps.test.ts

@@ -0,0 +1,13 @@
+import { optimizeDeps } from '../src/optimize-deps';
+
+describe('optimizeDeps', function () {
+  test('should produce default output when invoked without arguments', function () {
+    const actual = optimizeDeps();
+
+    const expected = {
+      exclude: ['@embroider/macros'],
+    };
+
+    expect(actual).toEqual(expected);
+  });
+});