ui: add profile picture hover animation

I wanted to practice doing animation in egui, so here is a simple
profile picture hover affect. When you mouse over a profile picture, it
get slightly bigger.

Signed-off-by: William Casarin <jb55@jb55.com>

src/ui/mod.rs

@@ -1,3 +1,4 @@
+pub mod anim;
 pub mod note;
 pub mod preview;
 pub mod profile;