[3.x] [tvOS] tvOS Support

[naithar]

Rework of #45829 and #45830 PRs.
Implements proposal: godotengine/godot-proposals#224

tvOS and iOS platform uses new UIKit platform to share functionality and code.
UIKIT_ENABLED flag is used instead of IPHONE_ENABLED.

Export code is from previous PRs:

• Launch screen is storyboard based (no need for launch images)
• tvOS project supports empty Apple Team ID
• Icons, Signatures and certificates are handled by Xcode project

Mono haven't been ported.
GDNative uses same configuration as iOS platform.
Support plugins that works the same way as iOS, but configuration is using .gdatvp

Related PRs: godotengine/build-containers#71, godotengine/godot-build-scripts#21 will be reworked for tvOS in future.

[naithar]

Without this change it's not possible to build debug binaries for iOS and tvOS platforms.

[jordo]

Great to see tvOS and iOS refactored to a commonish UIKit platform. UIKIT_ENABLED instead of IPHONE_ENABLED is nice

[jordo]

Could we not share the existing xcode .xcodeproj and define multiple build targets within that project, instead of having a separate one to maintain alongside the iOS one? Actually, it would kinda be nice to just have misc/dist/xcode and have separate build targets for iOS, tvOS, and macOS...

[naithar]

Could we not share the existing xcode .xcodeproj and define multiple build targets within that project, instead of having a separate one to maintain alongside the iOS one? Actually, it would kinda be nice to just have misc/dist/xcode and have separate build targets for iOS, tvOS, and macOS...

I don't see a benefit in sharing single project with multiple targets for completely different export profiles that have completely different setting for each platform, plugins system and other stuff.
There will be no benefit for a user to have a single project that require them to fill all fields unrelated to their target platform. Without filling them project wouldn't load. iOS, tvOS and macOS can share bundleID, teamID, maybe some more fields, but after that, they come with different configuration that's better to keep separate.
Also separate .xcprojects are easier to maintain in case we need specific configuration without changing non-target platform template.

[jordo]

Could we not share the existing xcode .xcodeproj and define multiple build targets within that project, instead of having a separate one to maintain alongside the iOS one? Actually, it would kinda be nice to just have misc/dist/xcode and have separate build targets for iOS, tvOS, and macOS...

I don't see a benefit in sharing single project with multiple targets for completely different export profiles that have completely different setting for each platform, plugins system and other stuff. There will be no benefit for a user to have a single project that require them to fill all fields unrelated to their target platform. Without filling them project wouldn't load. iOS, tvOS and macOS can share bundleID, teamID, maybe some more fields, but after that, they come with different configuration that's better to keep separate. Also separate .xcprojects are easier to maintain in case we need specific configuration without changing non-target platform template.

Fair enough, we just had quite a few frameworks that are universal and our own workflow is usually out of a single .xcodeproj with multiple build targets instead of multiple .xcodeproj for each platform (iOS, MacOS, tvOS). Seemed like maintaining a single .xcodeproj with multiple build targets might have been easier than 3 separate, (Storyboard, launchscreen, could be shared, or whatever other universal resource or framework).

I think the benefit may come from more in the maintenance of the .xcodeproj template in the godot repo itself (upgrade formats with new xcode versions, etc), not necessarily from sharing bundle ids, team ids, etc from a user's perspective. For specific configuration changes to a platform build target, we've always managed to achieve that pretty simple per target.

But all-in-all, minor suggestion.

[jordo]

@akien-mga is this PR supposed to be added to 4.0 milestone? #58977 is the [4.0] PR.

[gustaflindqvist]

@akien-mga is this PR supposed to be added to 4.0 milestone? #58977 is the [4.0] PR.

@jordo @naithar Is the minor suggestion of keeping only one .xcproject file hold this PR back from being added to the 4.0 milestone? Or will it might be added to the 4.1?

Would love to be able to support Apple Arcade demands of tvOS as well, when developing for their services.