ui: move note and profile rendering to notedeck_ui

We want to render notes in other apps like dave, so lets move
our note rendering to notedeck_ui. We rework NoteAction so it doesn't
have anything specific to notedeck_columns

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

crates/notedeck_ui/src/profile/picture.rs

@@ -58,11 +58,6 @@ impl<'cache, 'url> ProfilePic<'cache, 'url> {
         24
     }
 
-    #[inline]
-    pub fn no_pfp_url() -> &'static str {
-        "https://damus.io/img/no-profile.svg"
-    }
-
     #[inline]
     pub fn size(mut self, size: f32) -> Self {
         self.size = size;