* Add HID report/descriptor for a new report with mouse buttons,
and x/y/wheel deltas.
* New mouse key press behavior for press/release of mouse keys.
* Add constants for HID main item values (e.g. data/array/absolute)
* Define and use constants for our HID report IDs.
The application usage used by report 1 is `HID_USAGE_GD_KEYBOARD`. Moreover, the `keys` usage page (0x07) that primarily feeds into this report is predominantly keyboard codes. The rest of the system should align with this naming convention.
