FR: Add option to rotate the image about spyglass

[mryel00]

I added the exif based image/video rotation because it will generate no overhead on the Pi as it only sends about 100 bytes more per frame and those bytes don't have to be preprocessed. The only processing done is calculating the byte value of a number between 1 and 8.
Other options would be processing the image with something like PIL or OpenCV. Both creating extra overhead on the Pi.

[mryel00]

180° degree rotation is already implemented with #13
There isn't anything noted about 90° or 270° rotations in the picamera2 documentation so we need to process the frame before sending it.