Generate function-like macro binding instantiations for a known list of types

[Happypig375]

Maybe when -g macro-bindings is enabled and a function-like macro binding is encountered, force a lookup in the .rsp settings to find the user-supplied list of types to generate for?

For example for this:

• https://github.com/erincatto/box3d/blob/d421e45c828f6f853a145f726f0b9425d31146eb/include/box3d/id.h#L105
  I can supply all the ID types except b3WorldId for B3_ID_EQUALS such that ClangSharpInvokeGenerator knows which ones to generate for.

[tannergooding]

This still remains complex and problematic, particularly due to an inability to inline, understand the signature that needs to be generated, get concrete syntax for the macro to handle, etc

I had already looked at handling this via some auto function mapping in the past and it is a ridiculously complex task and likely not feasible to properly handle.

These types of macros tend to be few enough that it is better to do something like exclude the ones you've handled and then manually port them, often using appropriate generics + constraints instead. -or- to add a minimal handling+remapping in the include file that roots your traversal, as per the best-practices doc.