chore(deps): migrate to Bevy 0.17

- Event/EventReader/EventWriter renamed to Message/MessageReader/MessageWriter
- add_event → add_message for all 67 call sites
- ScrollPosition changed to tuple struct ScrollPosition(Vec2)
- CursorIcon import moved from bevy::winit::cursor to bevy::window
- WindowResolution::from((f32,f32)) removed — use (u32,u32) tuple
- World::send_event → World::write_message in test code

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

solitaire_app/src/main.rs

@@ -21,7 +21,7 @@ fn main() {
             DefaultPlugins.set(WindowPlugin {
                 primary_window: Some(Window {
                     title: "Solitaire Quest".into(),
-                    resolution: (1280.0, 800.0).into(),
+                    resolution: (1280u32, 800u32).into(),
                     ..default()
                 }),
                 ..default()