Add CameraFeed support for iOS

[shiena]

Split iOS definitions (squashing #98416).
I tested on iPhone 15 Pro (iOS 18.4.1)

Relations:

• [macOS] Fix missing frame_changed signal to CameraFeed #104809
• macOS: Allow users to select Continuity Camera #104857
• Support CameraFeed format on macOS #106777

[shiena]

CI errors should be resolved in #104857 .

[shiena]

applied the diff

Diff to apply after merging #104857 .

diff --git a/modules/camera/camera_macos.mm b/modules/camera/camera_macos.mm
--- a/modules/camera/camera_macos.mm	(revision e37d785a0a7f41d37aa42fe3689e86f322c13dc3)
+++ b/modules/camera/camera_macos.mm	(date 1747067891596)
@@ -314,10 +314,14 @@
 	if (@available(macOS 10.15, *)) {
 #endif
 		AVCaptureDeviceDiscoverySession *session;
-		if (@available(macOS 14.0, *)) {
+		if (@available(macOS 14.0, iOS 17.0, *)) {
 			session = [AVCaptureDeviceDiscoverySession discoverySessionWithDeviceTypes:[NSArray arrayWithObjects:AVCaptureDeviceTypeExternal, AVCaptureDeviceTypeBuiltInWideAngleCamera, AVCaptureDeviceTypeContinuityCamera, nil] mediaType:AVMediaTypeVideo position:AVCaptureDevicePositionUnspecified];
 		} else {
-			session = [AVCaptureDeviceDiscoverySession discoverySessionWithDeviceTypes:[NSArray arrayWithObjects:AVCaptureDeviceTypeExternalUnknown, AVCaptureDeviceTypeBuiltInWideAngleCamera, nil] mediaType:AVMediaTypeVideo position:AVCaptureDevicePositionUnspecified];
+#if TARGET_OS_IPHONE || TARGET_OS_MACCATALYST
+            session = [AVCaptureDeviceDiscoverySession discoverySessionWithDeviceTypes:[NSArray arrayWithObjects:AVCaptureDeviceTypeBuiltInWideAngleCamera, nil] mediaType:AVMediaTypeVideo position:AVCaptureDevicePositionUnspecified];
+#else
+            session = [AVCaptureDeviceDiscoverySession discoverySessionWithDeviceTypes:[NSArray arrayWithObjects:AVCaptureDeviceTypeExternalUnknown, AVCaptureDeviceTypeBuiltInWideAngleCamera, nil] mediaType:AVMediaTypeVideo position:AVCaptureDevicePositionUnspecified];
+#endif
 		}
 		devices = session.devices;
 #if defined(__x86_64__)

[fire]

On a brief review I didn't see anything bad, but also probably want to test to see it works.

[shiena]

@fire A camera feed demo project is available.
godotengine/godot-demo-projects#1225

[bruvzg]

Note: Camera code was moved out of the main repo to the godot-ios-plugins, because simply having it in the app (even if it's not used) require camera permission and marking the app as using camera on the AppStore. Which is not desired by majority of Godot project. So unless something about AppStore rules changed, this can't be merged.

[shiena]

In that case, I'd like to split the pull request as follows:

• Move the screen rotation angle notification part from godot_view_controller.mm to the main Godot engine
• Move the remaining camera preview angle settings from camera_macos.mm to the godot-ios-plugins