Restructure articles section into subsections

[davidsneighbour]

The articles section is quite long and, with the requirement to add new items to the bottom of the list, not well structured. I propose to add subsections like "templates", "howtos", "search", and so on to sort it a little bit better and make topics findable.

[budparr]

sounds good to me

[davidsneighbour]

I'll try some sorting tomorrow.

[pradnyasorbet]

I need to add images to Hugo file which IDE should I use