Feature Req: Rank Graph & custom background

[FxMorin]

I created a fork where I made some changes to better fit my needs.

Here's an example of what mine looks like:

It's meant to replace the old one using anuraghazra/github-readme-stats since its been having outages recently. Example:

I haven't put that much effort into the design, which is why this is a feature request. I quite like how the old one looked, but would like a self-hosted one using runners instead.

The requested changes are:

• Having a rank graph which shows your letter ranking with a circular progress bar.
• The ability to use a custom background image, such as an SVG. Allowing for cool animated backgrounds like the one I created.

I didn't create a PR since I don't believe the code I wrote is at the same standard, just something I wrote in my free time.
I will likely switch to that at some point, although I have no idea how to set that up yet. If this gets merged before than, ill use yours instead.

[cicirello]

@FxMorin it looks like I never actually acknowledged your feature request. I thought I had. Anyway, for the background image, do you have any thoughts on how to handle a background image whose dimensions are different than the stats image? I'm assuming scale to stats image dimensions since svgs generally scale well. But, if the width/height proportions differ from those of the stats image, it might look weird depending on what's in the background image. I'm thinking to just do it that way regardless and leave it to the user to ensure the background image dimensions work well.

[FxMorin]

@cicirello Ya I think you would let the user handle it. Although you could also attempt to keep the aspect ratio and crop it instead. I personally don't mind either.