Add Agent capabilities and configurations across the application

- Extend the AssistantConfig model to include agent_interface_type, agent_values, and agent_secrets for enhanced agent management.
- Update ModelType to include "Agent" for broader capability support.
- Seed new agent models and configurations in the database for Dify, FastGPT, and OpenCode applications.
- Modify the Assistant routes to validate and handle agent capabilities.
- Implement agent resource resolution in the config resolver for runtime configuration.
- Enhance the interface catalog with agent-specific fields and definitions.
- Update frontend components to manage agent configurations, including form handling and state management for agent-related inputs.

backend/routes/assistants.py

@@ -12,7 +12,7 @@ from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
 
 router = APIRouter(prefix="/api/assistants", tags=["assistants"])
-CAPABILITIES = ("LLM", "ASR", "TTS", "Realtime", "Embedding")
+CAPABILITIES = ("LLM", "ASR", "TTS", "Realtime", "Embedding", "Agent")
 
 
 def _validate_workflow(body: AssistantUpsert) -> None: