Fix file creation bug and fix UE_PATTERN initialization

[viatearz]

File Creation Bug:

The oflag parameter in the open() function is a combination of multiple flags, so it should be handled using a bitwise operation (&) rather than a direct comparison (==).
This ensures files are created with the correct permissions. I encountered an issue where all files were being created with incorrect permissions (000) in Infinity Nikki.

UE_PATTERN Initialization:

The getlogin_r() function is unreliable on macOS, it is recommended to use getpwuid() or NSUserName() to retrieve the username.
Additionally, the initialization of UE_PATTERN has been moved to the ue_status == 2 branch to ensure it only affects Unreal Engine games.

[Ryu-ga]

I didn't want to add these hooks, but I could not find fix FIOSPlatformFile::ConvertToIOSPath's wrong path. SourceCode

It would be a good idea to try fix it, If you can afford it.