Compiler detection engine

[FiniteReality]

Goal is to have something comparable to CMake, so the information we need to detect is:

• Path
• Version
• Supported architecture(s)
• Supported features/standards (C++17, C99, GNU C, etc.)
• Whether the compiler works (compile a test program)
• Word size/similar (can be done using above test program)

[FiniteReality]

I'm going to require clang/LLVM here. This way I can guarantee a more or less consistent behaviour between platforms.