[repository]: Fix cards in Discord

[kuzdogan]

Links pasted on Discord display the original URL to the h5ai's author website.

(image when pasting https://repo.sourcify.dev/contracts/full_match/1/0xd5B284609c4C82D2E23E924522797821b89D5AC6/)

• [x] Instead display Sourcify information.
• [x] Also check for Twitter and OpenGraph meta tags https://developer.twitter.com/en/docs/twitter-for-websites/cards/overview/markup Use og tags when possible

_{View in Huly HI-401}

[kuzdogan]

Updated. But since the image URL must be an absolute path, this will take effect once it's deployed on master