Add Kvaser Leaf support on macOS

### Is your feature request related to a problem? Please describe.
Add Kvaser Leaf support on macOS by using the MacCAN-KvaserCAN implementation (https://github.com/mac-can/MacCAN-KvaserCAN).

### Describe the solution you'd like
Add a new interface module to support using Kvaser Leaf on macOS.

### Describe alternatives you've considered
None.

### Additional context
Supporting this interface on macOS may require shipping a C++ extension.