xrOS: added to list of supported platforms (#2682)

### Dependencies:

- #2680
- #2681
- #2683

### Future changes:
- [x] Enable for `PurchaseTester`: #2685
- [ ] Build this target in `CI`
- [ ] Run tests on `xrOS`

RevenueCat.xcodeproj/project.pbxproj

@@ -3796,9 +3796,11 @@
 				RUN_DOCUMENTATION_COMPILER = YES;
 				SDKROOT = "";
 				SKIP_INSTALL = YES;
-				SUPPORTED_PLATFORMS = "macosx iphonesimulator iphoneos watchsimulator watchos appletvsimulator appletvos";
+				SUPPORTED_PLATFORMS = "appletvos appletvsimulator iphoneos iphonesimulator macosx watchos watchsimulator xros xrsimulator";
+				SUPPORTS_MACCATALYST = YES;
+				SUPPORTS_XR_DESIGNED_FOR_IPHONE_IPAD = YES;
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = DEBUG;
-				TARGETED_DEVICE_FAMILY = "1,2,3,4,6";
+				TARGETED_DEVICE_FAMILY = "1,2,3,4,6,7";
 			};
 			name = Debug;
 		};
@@ -3832,8 +3834,10 @@
 				RUN_DOCUMENTATION_COMPILER = YES;
 				SDKROOT = "";
 				SKIP_INSTALL = YES;
-				SUPPORTED_PLATFORMS = "macosx iphonesimulator iphoneos watchsimulator watchos appletvsimulator appletvos";
-				TARGETED_DEVICE_FAMILY = "1,2,3,4,6";
+				SUPPORTED_PLATFORMS = "appletvos appletvsimulator iphoneos iphonesimulator macosx watchos watchsimulator xros xrsimulator";
+				SUPPORTS_MACCATALYST = YES;
+				SUPPORTS_XR_DESIGNED_FOR_IPHONE_IPAD = YES;
+				TARGETED_DEVICE_FAMILY = "1,2,3,4,6,7";
 			};
 			name = Release;
 		};