feat: add workspace

src/domain/__init__.py

@@ -1,5 +1,7 @@
 __all__ = (
     'User',
+    'Workspace',
+    'WorkspaceUser',
     'TargetChannel',
     'ExternalChannel',
     'Creative',
@@ -17,6 +19,8 @@ __all__ = (
     'PostViewsAvailability',
     'LoginToken',
     'UserNotFound',
+    'WorkspaceNotFound',
+    'WorkspaceAccessDenied',
     'LoginTokenNotFound',
     'LoginTokenExpired',
     'LoginTokenAlreadyUsed',
@@ -44,6 +48,8 @@ from .error import (
     PlacementNotFound,
     TargetChannelNotFound,
     UserNotFound,
+    WorkspaceAccessDenied,
+    WorkspaceNotFound,
 )
 from .external_channel import ExternalChannel
 from .login_token import LoginToken
@@ -54,3 +60,4 @@ from .subscription import Subscription, SubscriptionStatus
 from .target_channel import TargetChannel, TargetChannelStatus
 from .telegram_state import TelegramState, TelegramStateEnum
 from .user import User
+from .workspace import Workspace, WorkspaceUser