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>

Cargo.lock

@@ -7340,7 +7340,6 @@ dependencies = [
  "jni 0.21.1",
  "jsonwebtoken",
  "keyring-core",
- "klondike",
  "reqwest",
  "serde",
  "serde_json",
@@ -7367,7 +7366,6 @@ dependencies = [
  "image",
  "jni 0.21.1",
  "kira",
- "klondike",
  "reqwest",
  "resvg",
  "ron",
@@ -7427,7 +7425,6 @@ dependencies = [
  "chrono",
  "console_error_panic_hook",
  "getrandom 0.3.4",
- "klondike",
  "serde",
  "serde-wasm-bindgen",
  "serde_json",