Add gist card `card_width` argument

Is your feature request related to a problem? Please describe.

We currently do not provide a way to set the card with the gist card while this option is available for the stats and language card.

Describe the solution you'd like

Adding the card_width argument to the gist card endpoint would be nice.

Describe alternatives you've considered

No response

Additional context

When this feature has been implemented and #3359 has been merged the card_width option can be moved to the https://github.com/anuraghazra/github-readme-stats?tab=readme-ov-file#common-options.