Reposting/crossposting to a community

[grahhnt]

Requirements

• [X] Is this a feature request? For questions or discussions use https://lemmy.ml/c/lemmy_support
• [X] Did you check to see if this issue already exists?
• [X] Is this only a feature request? Do not put multiple feature requests in one issue.
• [X] Is this a backend issue? Use the lemmy-ui repo for UI / frontend issues.

Is your proposal related to a problem?

If I see a post in the fediverse that would fit a community, it would be nice to crosspost/repost into that community

Describe the solution you'd like.

The ability to take any activitypub post and have the community boost it (similar to how communities "boost" posts made to them)

Some additional metadata (via activitypub addon) to show who crossposted/reposted the content to the community would be helpful

Describe alternatives you've considered.

Current solution to this is creating a URL post with the link to the content, but that prevents comments/upvotes from being federated back to the original content

Additional context

No response