Refactor API key management, add requirements file and .gitignore

Load API keys from environment variables using dotenv for not accidentally sharing API keys. Introduce requirements.txt for dependency management and .gitignore to exclude sensitive files and unnecessary directories.

.gitignore

+.env
+
+__pycache__/
+*.pyc
+
+venv/
+env/
+
+.DS_Store
+Thumbs.db
+
+.vscode/
+.idea/

main.py

-#pip install openai
-#pip install opik
-
+import os
+from dotenv import load_dotenv
 from openai_api import OpenAI
 from evaluator import ResponseEvaluator
 
-if __name__ == "__main__":
-    model = OpenAI(api_key=" ")
+def main():
+    load_dotenv()
+
+    openai_api_key = os.getenv('OPENAI_API_KEY')
+    opik_api_key = os.getenv('OPIK_API_KEY')
+
+    model = OpenAI(api_key=openai_api_key)
     response = model.get_response(prompt=" ")
 
-    evaluator = ResponseEvaluator(api_key=" ")
+    evaluator = ResponseEvaluator(api_key=opik_api_key)
     evaluation_result = evaluator.evaluate(response)
+
+if __name__ == "__main__":
+    main()

requirements.txt

+openai
+opik
+python-dotenv
\ No newline at end of file