Allow changes to the devices/hub through MQTT

[Skons]

This update allows for changes to the hub or devices through MQTT, to facilitate that a few changes had to be made. There are also other improvements. These are all the changes in this PR

• Disable hub alarm through MQTT
• Enable test alarm of a device through MQTT
• Rename a device through MQTT
• It is no longer needed to provide the ID, it can now be fabricated from the mac address of the hub
• The help shows the difference between required and optional
• All known ID's are know used for the DeviceType
• The DeviceType is reported as type_name in the MQTT payload
• The state of an AlarmSensor is now reported properly
• The readme is updated, it also accomodates the previous PR
• The protocol documentation has been updated by things I found
• Tests almost fully updated to the latest changes

One thing that i could not do was to write a proper test for the handle_device_messages, because I do not know how to do that properly.

I believe the following issues are addresses (maybe partially)
#12
#18
#7

[depuits]

This looks amazing. The only thing we wouldn't be able to do which is possible in the app is removing/replacing a device.

When enabling a test alarm can it then also be disabled through the hub like a normal alarm?

[Skons]

Replacing and/or removing can be done (i think), but i did not want to make this change to big. I was planning on implementing after this PR was approved.

I do not know about a real alarm, but as far as i know when you send a test alarm to your device with the app, you cannot silence the device. You can only silence the hub. The implementation of this PR is equal to that.

I have seen that the state of a device can be changed, but i did not take a deep dive into that, also because i could not really find that in the app. The only state that is set by the app, is the test alarm state.

[hildensia]

Great! Only had minor comments.

[hildensia]

Sorry. I think that solution is fine.