Improve c++ vtable parsing support

[trufae]

Use this doc as reference

https://hardwear.io/usa-2023/presentation/analyzing-decompiled-C++vtables-and-objects-in-GCC-binaries.pdf

[MewtR]

So I started looking into this a bit, was wondering if you had anything specific in mind. What would be the main improvement you'd like to see?

[trufae]

Yes, basically add support for what the document explains

[vingocheng]

I think different compiler have different vtable implement.

[trufae]

Yes, every compiler is differerent but at least for compat ressons c++ shares a bunch of abi stable agreements across different implementations but probably not for vtables