Add a way to make customized watch faces

[alphamodh0]

Thanks for your work, I'm exciting with Pine64's proyects. Can U add sny way to add custom watchfaces from the pair app? And a way to share this watchfaces with community.

[ajack2001my]

I support this, not just for watchfaces but also useful apps for the watch. Such a mechanism is important IMHO!

[kieranc]

This is absolutely on the roadmap and we all want it to happen, but it is complicated and depends on a bunch of other underlying stuff first, like the ability to load data onto the external flash.

[Danimations]

Glad to hear there's some progress being made on this front. Please keep in mind the prospect of importing a 240x240px .BMP via Bluetooth and using it as a watch background.

[Avamander]

Related to #321

[JF002]

I've just created a more generic feature request about dynamic app and custom watchface to group multiple requests around that topic. Feel free to continue the discussion in #1262 ;-)