[feature request] Control Azimuthal Window with Driver

[vinnnyr]

It would be nice to be able to control the azimuthal window of the lidar via a parameter file rather than control it using the firmware page

[SteveMacenski]

If there's a parameter in the SDK that lets us control that, we can certainly expose it! I see no qualms with that.

[vinnnyr]

after digging I realized someone else proposed this: #98 and the underlying version here: ouster-lidar/ouster_example#366

[bertaveira]

The problem was that after discussing in the main repo it was mentioned that azimuth window change in the lidar config requires a restart of the lidar (not manually but it has to internally restart). Therefore having that as a parameter would make the lidar have to start up twice taking twice as long to start then.

[SteveMacenski]

I can see their worry, but personally I'd say "OK" to that and just make sure its both documented and when its changed a warning is thrown to let someone know. If startup time is something they care about, then they can make that change more permanently elsewhere to help here - but that way they know but isn't blocking others.