chore: stage remaining scaffolding

src/tui/animations/mod.rs

@@ -0,0 +1,13 @@
+use rsille::canvas::Canvas;
+use std::time::Duration;
+
+pub trait Animation {
+    fn update(&mut self, delta: Duration);
+    fn render(&self, canvas: &mut Canvas);
+    fn is_finished(&self) -> bool;
+}
+
+pub trait ProgressAnimation: Animation {
+    fn set_progress(&mut self, progress: f64);
+    fn get_progress(&self) -> f64;
+}