refactor(onitama): extract tweens into factory functions

Centralize Onitama animation logic by moving inline Phaser tweens
into a dedicated `tweens.ts` configuration file. This improves
reusability and cleans up spawners and renderers.

Also updated documentation to warn against adding interruptions to
looped tweens to prevent game logic hangs.

docs/GamePatterns.md

@@ -59,6 +59,8 @@ Extend `Phaser.GameObjects.Container` to encapsulate visuals and state.
 ### 5. Tween Interruption
 Always register state-related tweens: `this.scene.addTweenInterruption(tween)`.
 Prevents visual glitches when game state changes mid-animation.
+DO NOT add interruptions for looped tweens.
+Otherwise the game logic will hang.
 
 ### 6. Scene Navigation
 Use `await this.sceneController.launch('SceneKey')`.
@@ -103,4 +105,4 @@ See `packages/framework/` for test setup examples.
 - `AGENTS.md` — Project overview, commands, and code style
 - `docs/GameModule.md` — GameModule implementation guide
 - `packages/framework/src/` — `boardgame-phaser` source code
-- `packages/onitama-game/src/` — Complete game implementation reference
+- `packages/onitama-game/src/` — Complete game implementation reference