Gallery app (with image send and receive via Bluetooth)

[Danimations]

Once user data storage on the Pinetime has been nutted out, it would be excellent if a Gallery app could be created. I foresee the app allowing the user to send and receive images to a paired device (phone or PC) via Bluetooth and also view sketches drawn in the Paint program (once a "save" facility has been added there). There are times when being able to show a simple image would be useful, in some cases that might be a photograph and in others, it could be something graphical like a QR code used for event ticketing or aircraft boarding.

This issue is linked to issue #1058 where I made some feature requests for the InfiniPaint app.