Support IL2CPP metadata on native binaries

[holly-hacker]

The idea would be to allow the user to select a metadata.dat file for native binaries that would allow the file to be disassembled as if it was a IL binary, except all methods would be shown as native and would have to be disassembled with the native disassembler.

Main difficulties:

• Implement my own IL2CPP metadata parser (Il2CppDumper's code is absolutely awful)
• Figure out how to replicate dnSpy's assemblynodes for a native binary, after it was initially loaded
  • maybe make our own root node and load binary ourselves?
• Improve navigation for the disassembler, possibly using a custom content provider

[holly-hacker]

Could be useful: https://github.com/djkaty/Il2CppInspector

[holly-hacker]

If this works out, I could look into doing the same for wasm modules