Support titled codeblocks

I would like to use titles for blocks of code. I previously did such template in the mediawiki, but now as articles were transferred to hugo, we need to bring this functionality here as well.

I have found the code here: https://discourse.gohugo.io/t/is-there-a-good-reason-not-to-have-a-mechanism-facilitating-a-title-for-code-blocks/40554/3

Here is how it looks:

Before	After