feat: add supports for loading mcp server as LLM tools provider

pkg/core/migrations/m037_mcp_config.py

@@ -0,0 +1,20 @@
+from __future__ import annotations
+
+from .. import migration
+
+
+@migration.migration_class("mcp-config", 37)
+class MCPConfigMigration(migration.Migration):
+    """迁移"""
+
+    async def need_migrate(self) -> bool:
+        """判断当前环境是否需要运行此迁移"""
+        return 'mcp' not in self.ap.provider_cfg.data
+
+    async def run(self):
+        """执行迁移"""
+        self.ap.provider_cfg.data['mcp'] = {
+            "servers": []
+        }
+
+        await self.ap.provider_cfg.dump_config()