Suggestion: Add aliases in `types`, `alignof` and `sizeof` for Windows data types

[rbuckton]

This would be useful when consuming Windows APIs when working with Windows API documentation.

A list of Windows data types can be found here:

• Common base types (like __int8, __int16, etc.)
• Common data types (like DWORD, DWORD64, HANDLE, etc.)

[brandonros]

Another: It would really help me if I could specify pointer4 versus pointer8 for when you have to call into 32-bit DLLs in a 64-bit program.

[Kreijstal]

would be nice if you could add things like wchar_t as well.