Add Contributors section

[P0ppoff]

Thanks to @abskmj we are know two contributors. It will be plesant to thanks all contributors by put their picture inside the main page.

Exemple of what it's look like : https://github.com/vuejs/vue#contribution

[Vindizh]

Hi, I'd like to help you with this one

[Vindizh]

@P0ppoff If you want this generated I suggest you to create an OpenCollective account, like it's been done for Vue repository
Otherwise I can just add contributors manually and you'll have a boilerplate to add others
How'd you like to add the contributors?

[P0ppoff]

@gitVn let's add contributor manually, you are not so many these day 😁

When the boilerplate start take time, I will found an other solution, hopefully as soon as possible