Add database query

rootfs/agents/DBQueryer/environment.py

@@ -0,0 +1,18 @@
+from typing import Optional
+
+from aios_kernel import Environment
+from aios_kernel.sql_database_function import GetTableInfosFunction, ExecuteSqlFunction
+
+
+class DBQuerierEnvironment(Environment):
+    def __init__(self):
+        super().__init__("fairy")
+        self.add_ai_function(GetTableInfosFunction())
+        self.add_ai_function(ExecuteSqlFunction())
+
+    def _do_get_value(self, key: str) -> Optional[str]:
+        pass
+
+
+def init():
+    return DBQuerierEnvironment()