refactor(engine,wasm,data): route all klondike/card_game imports through solitaire_core

All downstream crates now import Foundation, KlondikePile, Tableau,
Klondike, Session, Suit, Rank exclusively from solitaire_core.
solitaire_core is the single version-pin point for the upstream crates.

- solitaire_engine: 19 files updated, klondike direct dep removed
- solitaire_wasm: use statement updated, klondike direct dep removed
- solitaire_data: unused klondike dep removed
- Cargo.lock: klondike no longer a direct dep of engine/wasm/data
- Full workspace clippy clean, all tests pass

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

solitaire_engine/src/touch_selection_plugin.rs

@@ -28,7 +28,7 @@
 
 use bevy::ecs::message::MessageReader;
 use bevy::prelude::*;
-use klondike::KlondikePile;
+use solitaire_core::KlondikePile;
 
 use crate::card_plugin::CardEntity;
 use crate::events::StateChangedEvent;
@@ -192,7 +192,7 @@ fn spawn_touch_highlight(
 #[cfg(test)]
 mod tests {
     use super::*;
-    use klondike::Tableau;
+    use solitaire_core::Tableau;
 
     #[test]
     fn selection_state_default_is_idle() {