[Game] Animate life counter manipulation (#7100)

* Add animations toggles for the life counter and battlefield

Per-effect toggles plus Enable/Disable-all buttons: a life-counter
flash on loss and a crimson battlefield shimmer on damage.


Took 24 seconds

* Animate life changes with a counter flash and battlefield shimmer

- Life loss/gain pulses the player life counter with a brief flash
- The battlefield table zone shimmers crimson on damage
- Respects the per-effect animation toggles

Both effects drive their decay from GameScene's shared animation timer
through the IAnimatedItem interface (QElapsedTimer based), instead of
owning per-item QTimers.

Took 8 minutes

* Revert unintentional cherry picks

Took 2 minutes

* Lambda to re-use path calculation.

Took 8 minutes

---------

Co-authored-by: Lukas Brübach <Bruebach.Lukas@bdosecurity.de>

cockatrice/src/game_graphics/board/abstract_counter.h

@@ -35,6 +35,13 @@ protected:
     bool hovered = false;
     bool useNameForShortcut;
 
+    /**
+     * @brief Hook for subclasses that need per-value-change feedback (e.g. life-total flash).
+     *
+     * Called whenever the counter's value changes, before the item repaints.
+     */
+    virtual void onValueChanged(int oldValue, int newValue);
+
     void mousePressEvent(QGraphicsSceneMouseEvent *event) override;
     void hoverEnterEvent(QGraphicsSceneHoverEvent *event) override;
     void hoverLeaveEvent(QGraphicsSceneHoverEvent *event) override;