Add basic enviroment support. Can use env values in prompts right now.

test/env_test.py

@@ -0,0 +1,32 @@
+import asyncio
+import os
+import sys
+
+directory = os.path.dirname(__file__)
+sys.path.append(directory + '/../src')
+
+from aios_kernel import CalenderEnvironment,WorkflowEnvironment
+
+
+async def test_buildin_envs():
+    c_env = CalenderEnvironment("calender")
+    c_env.start()
+    print(c_env.get_value("now"))
+    async def show_event(eventid,event):
+        print(event.data)
+    c_env.attach_event_handler("timer",show_event)
+
+    w_env = WorkflowEnvironment("workflow",os.path.abspath(directory + "/../rootfs/workflow_env.db"))
+    w_env.set_value("test","test_aaaa")
+    print(w_env.get_value("test"))
+
+    await asyncio.sleep(10)
+
+
+if __name__ == "__main__":
+    #test_rstr = "abc is {abc}"
+    #values = {"abc":"123"}
+    #new_str = test_rstr.format_map(values)
+    #print(new_str)
+
+    asyncio.run(test_buildin_envs())