Purple Forest: New Feature: Rebloom

When a user sees a bloom they want to share, they want to be able to press a button to "re-bloom" the bloom.

This should add a bloom to their feed and should be shown to their followers (as if they'd bloomed it themselves), but but should make clear in the UI both who _originally_ bloomed it, and who _re-bloomed_ it. It should be obvious in the UI that this is different from a bloom they bloomed themself.

A bloom should also show how many times it has been re-bloomed (but maybe not show anything special if it's never been re-bloomed).

I'm not sure what timestamp a rebloom should have/show. Maybe the original bloom time? Maybe the time of the rebloom? Maybe both? Unclear...