error: allow user and external group ids

The V2 Error group field only accepted header.GroupId, which would lead to validation errors when smpclient received v2 error responses from SMP groups beyond the standard set. This change allows creating ErrorV2 instances for both User Groups defined in the tree (i.e. Intercreate) as well as for User Groups defined outside of the tree.

smp/error.py

@@ -8,7 +8,7 @@
 from pydantic import BaseModel, ConfigDict
 
 from smp import message
-from smp.header import GroupId
+from smp.header import GroupIdField
 
 T = TypeVar("T", bound=IntEnum)
 
@@ -80,7 +80,7 @@ class Err(BaseModel, Generic[T]):
 
     model_config = ConfigDict(extra="forbid", frozen=True, arbitrary_types_allowed=True)
 
-    group: GroupId
+    group: GroupIdField
     rc: T