DTS modules (device modules) often have a single source file with an empty `struct Module`.
The module's yaml file now allows a `dts-only` boolean to be set, so the source file becomes optional.
`devicetree.yaml` is renamed everywhere to `module.yaml`
USB Audio Class (UAC) output
Audio codec re-binding
Keyboard / Bluetooth HID
HID Consumer Control (media keys)
Symbol exports
Other fixes
IMU-based screen auto-rotate
See PR for details: https://github.com/TactilityProject/Tactility/pull/655
