Add ability to show statistics for all integrations

[mre]

What would you like to be added:

Would be great to have an option called "all" in the list of integrations. If it's selected, the stars and traffic tabs would show data for all integrations at once.

Why is this needed:

Would be great for getting a quick overview of the full status of all repositories.

Anything else we need to know?:

[andygrunwald]

Thanks for this suggestion @mre.
Indeed, this would be a very useful feature. I like it.

I do not have a concrete timeline on when to implement this, due to some other features that add additional value to the existing analysis. I will let you know once this is planned to implement or even shipped directly.