implement basic confserver plugins

- basic plugin system for confserver
  - allows adding api via plugins that can be saved in user data/plugins folder
  - relocated routes into internal plugins
 - add start_site to replace start_server
   - changed init code for starting confserver, this with the above fixes an issue of initializing the app twice

bumper/plugins/bumper_confserver_portal_iot.py

@@ -0,0 +1,76 @@
+#!/usr/bin/env python3
+import asyncio
+from aiohttp import web
+from bumper import plugins
+import logging
+import bumper
+from bumper.models import *
+from bumper import plugins
+from datetime import datetime, timedelta
+import string
+import random
+
+class portal_api_iot(plugins.ConfServerApp):
+
+    def __init__(self):
+        self.name = "portal_api_iot"
+        self.plugin_type = "sub_api"        
+        self.sub_api = "portal_api"
+        
+        self.routes = [
+ 
+            web.route("*", "/iot/devmanager.do", self.handle_devmanager_botcommand, name="portal_api_iot_devmanager"),
+
+        ]
+
+        self.get_milli_time = bumper.ConfServer.ConfServer_GeneralFunctions().get_milli_time
+  
+    async def handle_devmanager_botcommand(self, request):
+        try:
+            json_body = json.loads(await request.text())
+
+            randomid = "".join(random.sample(string.ascii_letters, 6))
+            did = ""
+            if "toId" in json_body:  # Its a command
+                did = json_body["toId"]
+
+            if did != "":
+                bot = bumper.bot_get(did)
+                if bot["company"] == "eco-ng":
+                    retcmd = await bumper.mqtt_helperbot.send_command(
+                        json_body, randomid
+                    )
+                    body = retcmd
+                    logging.debug("Send Bot - {}".format(json_body))
+                    logging.debug("Bot Response - {}".format(body))
+                    return web.json_response(body)
+                else:
+                    # No response, send error back
+                    logging.error(
+                        "No bots with DID: {} connected to MQTT".format(
+                            json_body["toId"]
+                        )
+                    )
+                    body = {
+                        "id": randomid,
+                        "errno": 500,
+                        "ret": "fail",
+                        "debug": "wait for response timed out",
+                    }
+                    return web.json_response(body)
+
+            else:
+                if "td" in json_body:  # Seen when doing initial wifi config
+                    if json_body["td"] == "PollSCResult":
+                        body = {"ret": "ok"}
+                        return web.json_response(body)
+
+                    if json_body["td"] == "HasUnreadMsg":  # EcoVacs Home
+                        body = {"ret": "ok", "unRead": False}
+                        return web.json_response(body)
+
+        except Exception as e:
+            logging.exception("{}".format(e))
+
+plugin = portal_api_iot()
+