Channels stubs with stubtest

[huynguyengl99]

No description provided.

[github-actions]

Diff from mypy_primer, showing the effect of this PR on open source code:

strawberry (https://github.com/strawberry-graphql/strawberry)
- strawberry/channels/handlers/base.py:14: error: Cannot find implementation or library stub for module named "channels.consumer"  [import-not-found]
- strawberry/channels/handlers/base.py:15: error: Cannot find implementation or library stub for module named "channels.generic.websocket"  [import-not-found]
+ note: "__init_subclass__" of "object" defined here
+ strawberry/channels/handlers/base.py:57: error: Incompatible types in assignment (expression has type "ChannelsLayer | None", base class "AsyncConsumer" defined the type as "BaseChannelLayer")  [assignment]
+ strawberry/channels/handlers/base.py:66: error: Argument 1 of "dispatch" is incompatible with supertype "AsyncConsumer"; supertype defines the argument type as "dict[str, Any]"  [override]
+ strawberry/channels/handlers/base.py:66: note: This violates the Liskov substitution principle
+ strawberry/channels/handlers/base.py:66: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#incompatible-overrides
+ strawberry/channels/handlers/base.py:77: error: Argument 1 to "dispatch" of "AsyncConsumer" has incompatible type "ChannelsMessage"; expected "dict[str, Any]"  [arg-type]
+ strawberry/channels/handlers/base.py:209: error: Definition of "channel_layer" in base class "ChannelsConsumer" is incompatible with definition in base class "AsyncWebsocketConsumer"  [misc]
- strawberry/channels/testing.py:13: error: Cannot find implementation or library stub for module named "channels.testing.websocket"  [import-not-found]
+ strawberry/channels/testing.py:101: error: Incompatible types in assignment (expression has type "dict[str, Any]", variable has type "ConnectionAckMessage")  [assignment]
+ strawberry/channels/testing.py:109: error: Incompatible types in assignment (expression has type "dict[str, Any]", variable has type "ConnectionAckMessage")  [assignment]
+ strawberry/channels/testing.py:146: error: Incompatible types in assignment (expression has type "dict[str, Any]", variable has type "ConnectionInitMessage | ConnectionAckMessage | PingMessage | PongMessage | SubscribeMessage | NextMessage | ErrorMessage | CompleteMessage")  [assignment]
+ strawberry/channels/handlers/ws_handler.py:69: error: Definition of "channel_layer" in base class "ChannelsConsumer" is incompatible with definition in base class "AsyncWebsocketConsumer"  [misc]
+ strawberry/channels/handlers/ws_handler.py:133: error: Argument 1 to "run" of "AsyncBaseHTTPView" has incompatible type "GraphQLWSConsumer[Context, RootValue]"; expected "GraphQLWSConsumer[None, None]"  [arg-type]
- strawberry/channels/handlers/http_handler.py:22: error: Cannot find implementation or library stub for module named "channels.db"  [import-not-found]
- strawberry/channels/handlers/http_handler.py:23: error: Cannot find implementation or library stub for module named "channels.generic.http"  [import-not-found]
+ strawberry/channels/handlers/http_handler.py:200: error: "BaseGraphQLHTTPConsumer" has no attribute "run"  [attr-defined]
+ strawberry/channels/handlers/http_handler.py:207: error: Argument "headers" to "send_headers" of "AsyncHttpConsumer" has incompatible type "dict[bytes, bytes]"; expected "Iterable[tuple[bytes, bytes]] | None"  [arg-type]
+ strawberry/channels/handlers/http_handler.py:360: error: Return type "Coroutine[Any, Any, ChannelsResponse | MultipartChannelsResponse]" of "run" incompatible with return type "ChannelsResponse" in supertype "SyncBaseHTTPView"  [override]
- strawberry/channels/router.py:14: error: Cannot find implementation or library stub for module named "channels.routing"  [import-not-found]