Slate Tutorial

Hi all. Three years from then, I was studying slate and found this useful tutorial that was, as everything in the wiki pages, not updated since 4.9.

I gave it a whole overhaul to 4.18 and updated everything, including comments and stuff that I thought could be confusing. I added additional comments and stuff copied from the documentation while having problems to find answers to certain compile errors I was having.

There are parts where I don’t exactly know why we are doing it this way… but it works right now.

I prefere not to include images on tutorials, since they normally are outdated all the time. I used explanations with text so that updating it is easier in the following versions.

Thanks for the tutorial ! hopfully this still helps other people in the future.