Add reusable tools and assistant bindings

- Introduce a new `Tool` model and `AssistantToolBinding` for managing reusable tools within the application.
- Implement CRUD operations for tools in the new `tools` route, allowing for the creation, retrieval, updating, and deletion of tools.
- Update the `Assistant` model to include a list of tool IDs, enabling assistants to utilize these tools.
- Enhance the backend routes to synchronize tool bindings with assistants, ensuring proper management of tool associations.
- Add frontend components for tool management, including a tool picker in the assistant configuration, improving user experience in tool selection.
- Create a mobile call page to facilitate video calls, integrating camera and microphone selection for enhanced communication capabilities.
- Update API definitions to include tool-related types and operations, ensuring consistency across the application.
- Add a migration script to create the necessary database tables for tools and bindings, supporting the new functionality.

backend/app.py

@@ -27,6 +27,7 @@ from routes import (
     knowledge_bases,
     model_registry,
     node_types,
+    tools,
     voice_webrtc,
     voice_ws,
 )
@@ -54,6 +55,7 @@ app.include_router(assistants.router)
 app.include_router(knowledge_bases.router)
 app.include_router(model_registry.router)
 app.include_router(node_types.router)
+app.include_router(tools.router)
 app.include_router(voice_webrtc.router)
 app.include_router(voice_ws.router)