Consider using Zig as a C/C++ compiler to enable cross-compilation scenarios

I noticed that DNNE doesn't currently support cross-compilation for all the usual reasons that cross-compilation is a nightmare.

The [Zig](https://ziglang.org) compiler supports cross-compilation out of the box across a wide range of platforms, and it contains an embedded Clang along with libc headers and/or sources for many platforms, allowing you to use `zig cc`/`zig c++` as a C/C++ compiler. Cross-compilation basically Just Works. This is one of the reasons I developed my [Zig SDK](https://docs.vezel.dev/zig-sdk) project.

It seems to me that using the Zig compiler as a C/C++ compiler for DNNE would be a ~perfect fit.

(FWIW, if this seems like a sensible thing to do, you could make use of the [Zig toolset packages](https://www.nuget.org/packages?q=vezel.zig.toolsets) I publish on NuGet with every Zig release.)