Port UnhollowerPdbGen to Il2CppInterop

[ds5678]

Original source: https://github.com/knah/Il2CppAssemblyUnhollower/tree/ea4ff499b2bd902de8ef2de3d132278cbb86ae4f/UnhollowerPdbGen

Modifications:

• Use Il2CppInterop.Common instead of UnhollowerBaseLib
• Use AsmResolver instead of Mono.Cecil
• Use .NET 9 instead of .NET 5
• Use AssetRipper.Bindings.MsPdbCore.
• Formatting

Resolves #105

[Kasuromi]

The general consensus when we picked the project up was to remove the pdb generation as it was deemed useless and used a proprietary windows only pdb library. I believe we were expecting Cpp2IL to deal with the pdb generation for us at one point or another. We can carry over the discussion on whether or not this feature is necessary for the time being on discord.

Relevant discord messages: here

[ds5678]

Superceded by SamboyCoding/Cpp2IL#382