Remove RxSwift in favor of combine

[allenhumphreys]

• [x] App startup is a flickering mess
• [x] Check for performance optimizations on the streams especially with regard to realm
• [x] Refine the UI binding extensions dealing with Error == Never and the default values and such. Also, add ones to drive an @Published UI property
• [x] TouchBar/Now Playing test?
• [x] CloudKit Code

[insidegui]

This is way smaller than I thought it would be 😅

We'll definitely wait until after next week's keynote before merging this, since we already have a lengthy PR (#669) for this year's update, but I'm definitely in favor of doing it.

[allenhumphreys]

@insidegui I think this should probably get merged in so you can start building on it too. I don't think it's perfect, but there's some good fixes in here.

I cannot test Touch Bar or CloudKit stuff, so there's a few places that are #if 'd away that may need to be migrated to Combine!

[insidegui]

@allenhumphreys I don't have Touch Bar hardware either, but there's a simulator in Xcode. Window > Touch Bar > Show Touch Bar. Could you test with that and let me know?

I'll check out the CloudKit stuff.

[allenhumphreys]

Could you test with that and let me know?

@insidegui It's still working as expected, I think the icons will get an update when you finish your branch, so remember to check the Touch Bar buttons in that branch!

[insidegui]

I wonder if we should even keep Touch Bar support in. It’s not trivial to support and Apple has made it quite clear that it’s a dead feature.

[allenhumphreys]

If the now playing stuff gives the basic controls in the touchbar... seems like that could make sense. On the other hand there are a lot of touchbar macs out there.