feat(skills and model):

1. Add the "Skills" module;
 2. The loading of the model square has been modified to be controlled through environment variables;
 3. Dynamic scheduling of the skill binding tool;
 4. Agent Integration Skills

api/app/models/agent_app_config_model.py

@@ -30,6 +30,7 @@ class AgentConfig(Base):
     memory = Column(JSON, nullable=True, comment="记忆配置")
     variables = Column(JSON, default=list, nullable=True, comment="变量配置")
     tools = Column(JSON, default=dict, nullable=True, comment="工具配置")
+    skill_ids = Column(JSON, default=list, nullable=True, comment="关联的技能ID列表")
 
     # 多 Agent 相关字段
     agent_role = Column(String(20), comment="Agent 角色: master|sub|standalone")