[FEATURE REQUEST] SDKCall support for mapping parameters to registers

[AnthonyIacono]

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Description

Compilers do funny things. But unfortunately, this means that calling certain functions is the SDK is currently not viable with SDKCall. For example, in CS:GO CFlashbangProjectile::Create is optimized to a __fastcall automatically by the compiler. This means that the first two parameters are put into ECX and EDX instead of being pushed on to the stack.

I think that SDKCall should basically mimic DHook, where you can pass an argument to PrepSDKCall_AddParameter to express which register that the parameter will live in. Even better, maybe just make it so DHook has a method that allows you to invoke a function directly, and at that point honestly SDKCall could be deprecated over time.