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/db/seed_assistants.sql

@@ -39,10 +39,13 @@ VALUES
   ('asst_002', 'TTS', 'model_004', '{}'),
   ('asst_003', 'ASR', 'model_002', '{}'),
   ('asst_003', 'TTS', 'model_004', '{}'),
+  ('asst_003', 'Agent', 'model_014', '{}'),
   ('asst_004', 'ASR', 'model_002', '{}'),
   ('asst_004', 'TTS', 'model_004', '{}'),
+  ('asst_004', 'Agent', 'model_015', '{}'),
   ('asst_005', 'ASR', 'model_002', '{}'),
-  ('asst_005', 'TTS', 'model_004', '{}')
+  ('asst_005', 'TTS', 'model_004', '{}'),
+  ('asst_005', 'Agent', 'model_016', '{}')
 ON CONFLICT (assistant_id, capability) DO UPDATE SET
   model_resource_id = EXCLUDED.model_resource_id,
   updated_at = now();