move generated stubs to separate directory, too messty

django-stubs-generated/db/migrations/exceptions.pyi

@@ -0,0 +1,26 @@
+from typing import Any, Optional, Tuple
+
+from django.db.migrations.migration import Migration
+from django.db.utils import DatabaseError
+
+
+class AmbiguityError(Exception): ...
+class BadMigrationError(Exception): ...
+class CircularDependencyError(Exception): ...
+class InconsistentMigrationHistory(Exception): ...
+class InvalidBasesError(ValueError): ...
+class IrreversibleError(RuntimeError): ...
+
+class NodeNotFoundError(LookupError):
+    message: str = ...
+    origin: None = ...
+    node: Tuple[str, str] = ...
+    def __init__(
+        self,
+        message: str,
+        node: Tuple[str, str],
+        origin: Optional[Migration] = ...,
+    ) -> None: ...
+
+class MigrationSchemaMissing(DatabaseError): ...
+class InvalidMigrationPlan(ValueError): ...