add nft-utils and links to github actions

[mashehu]

@netlify /nft-utils

[netlify[bot]]

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[mashehu]

@maxulysse resurrected this. happy to merge now

[mashehu]

@nf-core-bot fix linting

[maxulysse]

I feel you should be the one to merge, since you did all the work. Preview looks amazing.