Add comparison to GCam to the Readme

[ghost]

Is your feature request related to a problem? Please describe.
It would be nice to see the comparison between this app and some GCam version at the same number of frames, including for RAW, in Readme

Describe the solution you'd like
A table showing the comparison between GCam (left) and PhotonCamera (right) in different lightning conditions. Would be nice to see how each app handles extreme noise and motion

Describe alternatives you've considered
Test manually

Additional context
Of course testing manually is the best idea but the Readme comparison would be great for those who just discovered the app