feat: ✨ added "--no-ext-diff" flag when create_patch=True to diff

Author: can-taslicukur

Diff for: git/diff.py

@@ -155,6 +155,8 @@ def diff(
 
         if create_patch:
             args.append("-p")
+            # we expect the default diff driver
+            args.append("--no-ext-diff")
         else:
             args.append("--raw")
             args.append("-z")