Add OpenGraph image

[LitoMore]

Adds an OpenGraph image for a better visual in X/Twitter and other link-share previews.

The opengraph.svg is the design source file. It's designed with GPT-5.5.

And I stored some badges used on the OpenGraph image to the opengraph-badges/ folder so that you can build the PNG image without network.

Preview

[github-actions]

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📖	✨ Thanks for your contribution to Shields, @LitoMore!

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[PyvesB]

stars | community feels a little odd, don't we generally render a star rating in these kind of badges?

[LitoMore]

Ah yeah, I've updated the stars | community badge to ratings badge, and changed the static | customized to the npm badge with logo.

[PyvesB]

Thanks for the update! The last thing that doesn't look quite realistic is the colors (e.g. yellow for MIT). Could you make a pass over those to ensure they are in line with what would be shown in real badges?

[LitoMore]

Done. I also updated other badges to the correct color.

[PyvesB]

Thanks! Looks good to me, we can always iterate more later on :)