feat: parse quest using zod, basic

packages/constants/tests/response.test.ts

@@ -0,0 +1,22 @@
+import { describe, it, expect } from '@jest/globals'
+import { responseSchema } from '../src/quest/response.js'
+
+describe('parsing response', () => {
+  it('should parse valid response', () => {
+    const response = {
+      type: 'narrative',
+      content: 'This is a response content',
+    }
+    const result = responseSchema.safeParse(response)
+    expect(result.error).toBeUndefined()
+  })
+
+  it('should fail to parse invalid response', () => {
+    const response = {
+      type: 'dialogue',
+      content: 'This is a response content',
+    }
+    const result = responseSchema.safeParse(response)
+    expect(result.error).toBeUndefined()
+  })
+})