Handler for lemmyverse.link shared links.

[RandomDennisLee]

Pull Request Description

Added check for links in the format of "lemmyverse.link/known_instance/post/1234". Compared against known_instance.dart to look for lemmy / piefed shared links. Domain is generic, will match any domain.

On match, will rewrite the link from "lemmyverse.link/known_instance/post/1234" to "known_instance/post/1234" and pass it on to the existing link parsers.

Issue Being Fixed

Issue Number: Add support for lemmyverse links

Screenshots / Recordings

Checklist

• [N/A] If a new package was added, did you ensure it uses an appropriate license and is actively maintained?
• [N/A] Did you use localized strings (and added appropriate descriptions) where applicable?
• [N/A] Did you add semanticLabels where applicable for accessibility?