Camera demo rgb stereo align

[mribbons]

Resolve RGB alignment issue by using stereo.setDepthAlign(dai.CameraBoardSocket.RGB)

Note that we need the python libs as per https://github.com/luxonis/depthai-python/pull/147/commits/0a27ebcf5301ba9166d014bbbb543e431b5af212 for this to work.

We get some warnings, and the disparity frames seem to flick back to front a bit.

If we run without -pcl, to test if it's a performance issue on host side, the left/right flickering is quite fast.

python main.py -ext 1 -sub 0 -pcl -rgb -lr 0

[14442C1091EB8FD000] [8.681] [StereoDepth(5)] [warning] Median filter usage with LR-check/Extended/Subpixel is not yet implemented. The filter will be disabled [14442C1091EB8FD000] [8.681] [StereoDepth(5)] [warning] DepthAlign option ignored, as it requires LR-check mode to be enabled

[Luxonis-Brandon]

Awesome, thanks! CC: @saching13

[saching13]

Thanks alot for the PR.

[Erol444]

Closing due to inactivity.