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/animation_plugin.rs

@@ -1078,7 +1078,7 @@ mod tests {
         // Pairs the existing audio (`card_invalid.wav`) and visual
         // (`feedback_anim_plugin::queue_shake_for_rejected_move`) feedback
         // with an accessibility-focused readable text cue.
-        use klondike::{KlondikePile, Tableau};
+        use solitaire_core::{KlondikePile, Tableau};
         let mut app = App::new();
         app.add_plugins(MinimalPlugins).add_plugins(AnimationPlugin);