Modularize the C++ kernel to accept for more compilers or future standards

[anhvlttfs]

What is modularization of the C++ kernel

Since version 1.0.0a9, @shiroinekotfs and I have introduced many C++ standards. It had been done using the separated kernel handler, which means the C++ code execution and the environment package (including the compiler used and standard) are separated.

This move, however, turns out to be a good opportunity to make the C++ code execution module accept more parameters, for example, not just the compiler type - gcc, but the whole processing, compiling, and executing of the C++ code cycle.

Assignments

@shiroinekotfs and I are currently working privately with this idea.