feat!: Improve device type registration

Instead of one function that contains all the device types available in
`automation_devices` a global registry is used were each device can
register itself.

automation_devices/src/hue_group.rs

@@ -24,6 +24,7 @@ pub struct Config {
 pub struct HueGroup {
     config: Config,
 }
+crate::register_device!(HueGroup);
 
 // Couple of helper function to get the correct urls
 #[async_trait]