Allow linking to a specific card

[merwok]

fixes for #136

[merwok]

two things missing:

• adapt css so that there is a top padding so we can see the full card
• add links somewhere: the language name maybe? (I would prefer this and not # or ⛓️ emoji so that all links have a different text (accessibility rule))

[StanFromIreland]

Unfortunately the CI will fail because it only properly works on branches of this repo, I will open a PR to fix it.

[StanFromIreland]

adapt css so that there is a top padding so we can see the full card

I with manual testing I find a scroll-margin-top: 4.5rem; looks pretty good.

[merwok]

Will that work if applied on the card div, not on the row?

[StanFromIreland]

When I tested, I added it to the card class, and it worked fine.

FYI, update the branch and the CI will go green.