Help section about smarp

[riccardoporreca]

@gabrielfoix, see #65, where it was mentioned to possibly use a vignette within the app. Still, note the concerns in #122 about vignettes maintenance.

I still agree an help section in the app is surely something desirable though.

[gabrielfoix]

@riccardoporreca, we should address the maintenance of the vignettes and documentation.
The main idea behind this issue though, is to make more visible our contact info, etc.
Maybe we can consider as well to place the github link on the top right instead of the bottom left.
I will discuss it with @nfarabullini

[riccardoporreca]

@gabrielfoix, sure, just keep in mind that

• the top-left SmaRP sticker already links to the GitHib repo
• the app will be served soon from within our website gallery, so we have to make sure things also look nicely there

We could have an info (i) button displaying relevant information / links upon clicking, but I leave it up to you two to discuss ideas more in detail.