sensor: PA3905: Add basic functionality

- Add bus support for SPI (based on RTIO).
- Support read/decode API for one-shot reads on the following channels:
    - SENSOR_CHAN_POS_DX.
    - SENSOR_CHAN_POS_DY.
    - SENSOR_CHAN_POS_DXYZ.

Signed-off-by: Luis Ubieda <luisf@croxel.com>
13 files changed