fix: downgrade iced_fonts to 0.1 for iced 0.13 compatibility

iced_fonts 0.3 pulls in iced_widget 0.14 / iced_renderer 0.14 which
breaks release builds when used alongside iced 0.13. Pin to 0.1.x
which targets iced 0.12/0.13 and drop the unused iced_aw dependency.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/gui.rs

@@ -1167,7 +1167,7 @@ pub fn run(config: &Config) -> Result<()> {
     iced::application(|_: &Dashboard| String::from("umutray"), update, view)
         .subscription(subscription)
         .theme(|_| Theme::Dark)
-        .font(iced_aw::iced_fonts::BOOTSTRAP_FONT_BYTES)
+        .font(iced_fonts::BOOTSTRAP_FONT_BYTES)
         .window(iced::window::Settings {
             size: iced::Size::new(600.0, 560.0),
             ..Default::default()