C++ features

Moved to turpin.dev.

References

• https://devdocs.io/cpp/23
• https://en.wikipedia.org/wiki/C%2B%2B23
• https://en.wikipedia.org/wiki/C%2B%2B20
• https://en.wikipedia.org/wiki/C%2B%2B17
• https://turpin.one/posts/fav.html