Fix crash when parsing error code config with typo (#16005)

Fixes #16002

Author: hauntsaninja

mypy/config_parser.py

@@ -434,11 +434,26 @@ def parse_section(
     """
     results: dict[str, object] = {}
     report_dirs: dict[str, str] = {}
+
+    # Because these fields exist on Options, without proactive checking, we would accept them
+    # and crash later
+    invalid_options = {
+        "enabled_error_codes": "enable_error_code",
+        "disabled_error_codes": "disable_error_code",
+    }
+
     for key in section:
         invert = False
         options_key = key
         if key in config_types:
             ct = config_types[key]
+        elif key in invalid_options:
+            print(
+                f"{prefix}Unrecognized option: {key} = {section[key]}"
+                f" (did you mean {invalid_options[key]}?)",
+                file=stderr,
+            )
+            continue
         else:
             dv = None
             # We have to keep new_semantic_analyzer in Options