refactor(testAi.ts): update import statements to use OpenAI type for …

…better clarity and maintainability

fix(testAi.ts): change parameter type in generateCommitMessage method to align with OpenAI's updated type definitions

src/engine/testAi.ts

@@ -1,5 +1,6 @@
-import { ChatCompletionRequestMessage } from 'openai';
-import { AiEngine, AiEngineConfig } from './Engine';
+import { OpenAI } from 'openai';
+
+import { AiEngine } from './Engine';
 
 export const TEST_MOCK_TYPES = [
   'commit-message',
@@ -25,7 +26,7 @@ export class TestAi implements TestAiEngine {
   }
 
   async generateCommitMessage(
-    _messages: Array<ChatCompletionRequestMessage>
+    _messages: Array<OpenAI.Chat.Completions.ChatCompletionMessageParam>
   ): Promise<string | undefined> {
     switch (this.mockType) {
       case 'commit-message':