Following my tuto on how to build a tabs feature - (You will find it here), I did the same but even more condensed by putting the buttons on the left by creating a two columns layout.
The setup for all of this is not small but it gathers a lot of code snippets that I and other community members brought here. A perfect example to show you how multiple snippets can fit together to make something unique.
@matthieu_chateau - I might be over my skis here but if I have two custom code blocks with buttons in them, how do I apply the lateral styling/positioning to only one block of buttons? Thanks!