Add [language: C++] [version: 2023]

[fauvian]

Please complete the following information:

• Name: C++
• Version: 2023
• Release Note/Changelog:

Here is a Wiki page on C++ 23 features:

https://en.wikipedia.org/wiki/C%2B%2B23

:+1: reaction might help to get this request prioritized.

[hobovsky]

Related: #113