Use wrapper type for CFUUID

[killercup]

This no longer exposes CGDisplayCreateUUIDFromDisplayID and instead offers a new CfUuid type that can be created from a display ID and also cleans itself up on drop.

Closes #4031

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• Tested on all platforms changed
  • Tested examples on macOS 15.1.1
• Added an entry to the changelog module if knowledge of this change could be valuable to users
• Updated documentation to reflect any user-facing changes, including notes of platform-specific behavior
• Created or updated an example program if it would help users understand this functionality

[killercup]

Saw #4031 randomly and thought I'd take stab at it. I'm not sure this is releasing the right thing but it seems to work without issues. Please someone double check :)

[madsmtm]

I think such wrappers actually already exist? Use core_foundation::uuid::CFUUID and CFUUID::wrap_under_create_rule?

[madsmtm]

Also, I was a bit unsure, but read the docs on ARC does seem to suggest that since the function contains Create in the name, it should definitely be released afterwards.

[killercup]

I think such wrappers actually already exist? Use core_foundation::uuid::CFUUID and CFUUID::wrap_under_create_rule?

Oh nice, didn't know about this! Also took me look into the source to confirm it calls release :) It doesn't seem to derive Hash, PartialOrd, and Ord, though… I can try to get this added upstream but I'm not even sure if treating these UUIDs as Ord makes sense?

[madsmtm]

UUIDs are definitely Ord. But I think you can use CFUUIDGetUUIDBytes to get the actual values of the UUID, and then compare that instead?

[madsmtm]

But I'd also be fine with converting them to a pointer, and implementing Ord by comparing the pointer addresses (that's what we're currently doing).