[WIP] Adjust protocol for multiple actions per button

[Copilot]

Thanks for asking me to work on this. I will get started on it and keep this PR's description up to date as I form a plan and make progress.

Original prompt

Adjust the protocol to mention this:

Allow the hardware (or software, such as BikeControl) to send multiple actions per button. E.g. the plus button sends three different actions simultaneously:

• 0x01 for shift up
• 0x30 for increasing resistance
• 0x14 for selecting in menus

This would also make it easy and very flexible to optionally remap the hardware buttons or your OpenBikeControl-compatible controller or gamepads, as we know which actions are supported by the trainer app (App Information Characteristic).

Also adjust:

• change the enum values (Social/Emotes, and Camera 1-X) to use a single action but with analog value.

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