Add Feishu channel implementation and refactor notification handling

- Introduced a new `FeishuChannel` class that extends `BaseChannel`, implementing methods for message handling and event processing.
- Added lifecycle management for the Feishu websocket channel in the FastAPI application.
- Removed deprecated `FeishuTools` and related notification handling, transitioning to a class-based approach for better encapsulation.
- Updated notification system to dynamically load channel handlers, enhancing modularity and maintainability.
- Refactored status handling in the frontend to accommodate new status definitions for scheduled runs.

Author: InfernalAzazel

openfox/interfaces/__init__.py openfox/channels/__init__.pyopenfox/interfaces/__init__.py renamed to openfox/channels/__init__.py

@@ -0,0 +1,33 @@
+from abc import ABC, abstractmethod
+from typing import Any, Dict, Optional, Union
+
+from agno.agent import Agent, RunOutput
+from agno.agent.remote import RemoteAgent
+from agno.team.remote import RemoteTeam
+from agno.team.team import Team
+from agno.workflow import RemoteWorkflow, Workflow
+
+class BaseChannel(ABC):
+    """Base class for all message channels."""
+
+    @abstractmethod
+    def __init__(
+        self,
+        agent: Optional[Union[Agent, RemoteAgent]] = None,
+        team: Optional[Union[Team, RemoteTeam]] = None,
+        workflow: Optional[Union[Workflow, RemoteWorkflow]] = None,
+    ):
+        self.type: str = None
+        raise NotImplementedError
+
+    @abstractmethod
+    def start(self):
+        raise NotImplementedError
+
+    @abstractmethod
+    def send_message(self, receive_id: str, content: Any, msg_type: str = "text", **kwargs):
+        raise NotImplementedError
+
+    @abstractmethod
+    async def on_notify_scheduled(run_output: RunOutput, channel: Dict[str, Any]) -> None:
+        raise NotImplementedError