Add support for Xcode 16 and synchronized groups

[gui17aume]

This PR aims to support Xcode 16 project files and especially the new file system synchronized groups.

It is based on the work done by @Brett-Best in this other PR: #942 👍

Changes

• Add the new object version 77
• Add types and fields related to file system synchronized groups :

  PBXNativeTarget
+   fileSystemSynchronizedGroups

+ PBXFileSystemSynchronizedRootGroup
+   exceptions
+   explicitFileTypes
+   explicitFolders
+   indentWidth
+   path
+   sourceTree
+   tabWidth
+   usesTabs
+   wrapsLines

+ PBXFileSystemSynchronizedBuildFileExceptionSet
+   additionalCompilerFlagsByRelativePath
+   attributesByRelativePath
+   membershipExceptions
+   platformFiltersByRelativePath
+   privateHeaders
+   publicHeaders
+   target

+ PBXFileSystemSynchronizedGroupBuildPhaseMembershipExceptionSet
+   buildPhase
+   membershipExceptions
+   platformFiltersByRelativePath

  XCBuildConfiguration
+   baseConfigurationReferenceAnchor
+   baseConfigurationReferenceRelativePath

[amorde]

Thank you @Brett-Best and @gui17aume both for contributing this 🙏

I'm going to do some follow up testing & updates for Xcode 16 and then will ship a new release.

[drewolbrich]

Thank you @gui17aume and @Brett-Best !!
❤️❤️❤️

[walkingbrad]

is there a reason you have this explicit string here vs what Xcode itself generates here: PBXFileSystemSynchronizedBuildFileExceptionSet

Xcode replaces this string with that when editing the project file, so we're seeing a back-and-forth diff of this comment being edited by both parties.

[Brett-Best]

I checked in Xcode 16.2RC and this string format is what is used on my projects still.

[walkingbrad]

#1000

oh I'm on 16.1, let me try 16.2 real quick to verify

[walkingbrad]

hmm Xcode 16.2 RC still reverts this comment:

1. we're calling fastlane increment_version_number_in_xcodeproj, which just does project = Xcodeproj::Project.open, edits a build setting, then does project.save
2. this custom comment then gets added
3. move a package/group/file in Xcode that is tracked in the project file
4. the comment now becomes PBXFileSystemSynchronizedBuildFileExceptionSet