refactor: move initialize_client function to a separate file for better modularity

lib/ai_web_researcher/firecrawl_web_crawler.py

@@ -1,7 +1,4 @@
-import os
-from pathlib import Path
-
-from firecrawl import FirecrawlApp
+from firecrawl_client import initialize_client
 import logging
 from dotenv import load_dotenv
 # Load environment variables from .env file
@@ -10,18 +7,6 @@ load_dotenv(Path('../../.env'))
 logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(levelname)s - %(message)s')
 
 
-def initialize_client():
-    """
-    Initialize and return a Firecrawl client.
-
-    Args:
-        api_key (str): Your Firecrawl API key.
-
-    Returns:
-        firecrawl.Client: An instance of the Firecrawl client.
-    """
-    return FirecrawlApp(api_key=os.getenv("FIRECRAWL_API_KEY"))
-
 
 def scrape_website(website_url, depth=1, max_pages=10):
     """