NSObject is defined incorrectly in builtin type libraries

[WeiN76LQh]

Version and Platform (required):

• Binary Ninja Version: 4.3.6541-dev (2a7e8df1)
• OS: macOS
• OS Version: 15.1.1
• CPU Architecture: M1

Bug Description:
For a Mach-O binary NSObject has the following type definition in the ioscommon-aarch64 library:

typedef struct objc_class* NSObject;

While this is not entirely incorrect its not really the best way to define it.

When viewing DSC the type definition is actually incorrect but in a different way for some reason:

struct NSObject
{
    struct objc_class_t isa;
};

Additionally the size of the NSObject is 8 initially when viewing DSC, but if you go to change the type of its only field, isa, and then just provide the exact same type, NSObject becomes 0x28 in size. This is the correct size for that definition because objc_class_t is that size and the definition defines it as an inline struct field.

Expected Behavior:
The type definition is more accurately defined as:

struct NSObject
{
    struct objc_class_t *isa;
};

One of the benefits of this is it allows it to be used as a base class for other class/struct definitions.