Distinguish blocking "instance communities" and "instance users"

[Sjmarf]

Blocking an instance through the Lemmy API hides all posts made to communities on that instance. It does not prevent you from seeing posts/comments made by that instance's users to communities not on that instance.

We could provide this functionality.

[Sjmarf]

Lemmy 1.0 has support for this.

[Sjmarf]

Current status:

• Lemmy < 1.0 can block an instance's communities
• Piefed can block an instance's users
• Lemmy 1.0 can do both

When you tap "block" on an instance, we could show a half-height sheet allowing you to choose which to block.