Reformat the error to match OpenAI's

copilot_proxy/utils/errors.py

@@ -0,0 +1,19 @@
+from typing import *
+
+class FauxPilotException(Exception):
+    def __init__(self, message: str, type: Optional[str] = None, param: Optional[str] = None, code: Optional[int] = None):
+        super().__init__(message)
+        self.message = message
+        self.type = type
+        self.param = param
+        self.code = code
+
+    def json(self):
+        return {
+            'error': {
+                'message': self.message,
+                'type': self.type,
+                'param': self.param,
+                'code': self.code
+            }
+        }