Crop NFT description after 3 lines

[modersohn]

Fixes #199

• locally defines the style since only used here for now

From what I understand, we should be safe to use -webkit-line-clamp.

Screenshot on macOS with Safari:

Same NFT on mobile fits into 3 lines, so it isn't cropped:

[fudgebucket27]

nice and simple with the css!

[fudgebucket27]

looks fine for me in chrome, edge and firefox. ill merge this

[daniel-soli]

Nice!