[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.cpp

@@ -29,8 +29,9 @@ AbstractCounter::AbstractCounter(CounterState *state,
 {
     setAcceptHoverEvents(true);
 
-    connect(state, &CounterState::valueChanged, this, [this](int, int newValue) {
+    connect(state, &CounterState::valueChanged, this, [this](int oldValue, int newValue) {
         value = newValue;
+        onValueChanged(oldValue, newValue);
         update();
     });
 
@@ -228,3 +229,9 @@ void AbstractCounterDialog::changeValue(int diff)
     curValue += diff;
     setTextValue(QString::number(curValue));
 }
+
+void AbstractCounter::onValueChanged(int /*oldValue*/, int /*newValue*/)
+{
+    // Default: no feedback. Subclasses such as PlayerCounter override this to
+    // flash the counter on meaningful changes (life gain/loss).
+}