Fix UnicodeDecodeError in litellm when loading JSON files on Windows

Co-Authored-By: Joe Moura <joao@crewai.com>

src/crewai/patches/litellm_patch.py

@@ -0,0 +1,49 @@
+"""
+Patch for litellm to fix UnicodeDecodeError on Windows systems.
+
+This patch ensures that all file open operations in litellm use UTF-8 encoding,
+which prevents UnicodeDecodeError when loading JSON files on Windows systems
+where the default encoding is cp1252 or cp1254.
+"""
+
+import builtins
+import functools
+import io
+import json
+import logging
+import os
+from importlib import resources
+from typing import Any, Optional, Union
+
+logger = logging.getLogger(__name__)
+
+
+def apply_patches():
+    """Apply all patches to fix litellm encoding issues."""
+    logger.info("Applying litellm encoding patches")
+    
+    original_open = builtins.open
+    
+    @functools.wraps(original_open)
+    def patched_open(
+        file, mode='r', buffering=-1, encoding=None, 
+        errors=None, newline=None, closefd=True, opener=None
+    ):
+        if 'r' in mode and encoding is None and 'b' not in mode:
+            encoding = 'utf-8'
+        
+        return original_open(
+            file, mode, buffering, encoding, 
+            errors, newline, closefd, opener
+        )
+    
+    builtins.open = patched_open
+    
+    logger.info("Successfully applied litellm encoding patches")
+
+
+def remove_patches():
+    """Remove all patches (for testing purposes)."""
+    if hasattr(builtins, '_original_open'):
+        builtins.open = builtins._original_open
+        logger.info("Removed litellm encoding patches")