Shamir Secret Sharing in 256 characters or less

This is a submission for DEV Computer Science Challenge v24.06.12: One Byte Explainer.

Explainer

You and your friends have a treasure map (secret). You cut it into pieces so no one can find the treasure alone.Each friend gets a piece (share). BUT, you cut it in such a way that only a certain number of you need to be there (quorum).