feat!: Use single 1024x1024 icon

[jcesarmobile]

Xcode 14 allows to use a single 1024x1024 icon instead of having all the icon sizes.

It's breaking because it requires Xcode 14, but since Xcode 14.1 is going to be required for app store submissions starting the 25 of April, I think we are good.

Removed the icon sizes link because it was broken

Closes #1019
closes #1233

[dpogue]

We should make sure this works properly if someone just puts <icon src="res/ios/icon.png" /> in their config.xml (with no sizes specified).

There's a part of me that thinks it would be good to have some support for customizing the notification and watch icons, but that would involve dynamically adding them to the .xcassets Contents.json only if they were specified, which feels like it would be error-prone if people are mixing manual changes and automatic ones 😞

[codecov-commenter]

Codecov Report

Merging #1309 (1b6a41b) into master (3d6c71a) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1309   +/-   ##
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  Coverage   78.48%   78.48%           
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  Files          15       15           
  Lines        1780     1780           
=======================================
  Hits         1397     1397           
  Misses        383      383           

Impacted Files	Coverage Δ
lib/prepare.js	85.02% <ø> (ø)

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[jcesarmobile]

If using single icon, Xcode only allows a single icon, doesn’t allow to add a different icon notifications.
It allows a different icon for watchOS, but at the moment it was using the same as for iOS

[dpogue]

Ahh okay

[dpogue]

Note: Closes #1019 & closes #1233

[breautek]

It's also breaking in the sense it requires iOS 12+

So I think we also need to bump CordovaLib min target to iOS 12, which doesn't have to be part of this PR, but it will need to be set for this feature.

[breautek]

FWIW, we've gone back in our apps and just supplied the icons that were missing (so that we aren't relying on a feature that may not even make it into release).

This appears to cover all current icons, at least for the iPhone models.

[erisu]

I believe it was decided to staying on iOS 11, so I think this PR can be closed.
Is a nice idea though. Maybe in a future release.