get real mqtt connection working

src/weather_portal.gleam

@@ -1,15 +1,17 @@
 import config
 import gleam/erlang/process
 import gleam/io
-
-// import mqtt
+import mqtt
 import mqtt_dummy
 import sensors
 
 pub fn main() -> Nil {
-  let _cfg = config.load_config()
+  let cfg = config.load_config()
   io.println("Config loaded successfully!")
 
+  let mqtt_updates = process.new_subject()
+  let client = mqtt.start(cfg, mqtt_updates)
+
   let assert Ok(dummy_one) = mqtt_dummy.start()
   let assert Ok(dummy_two) = mqtt_dummy.start()
   process.send_after(dummy_one, 1000, mqtt_dummy.Proc)