[Game] [Arrows] Use arrowData/registry and generate unique server-side ids (#6973)

* [Game] [Arrows] Track creatorId, use arrowData in arrowItem, use registry, generate unique arrow id's on server side and delete-on-exist inserts.

Took 2 minutes

Took 1 minute

* Fix emitting slot instead of signal.

Took 15 minutes

* Clear arrows locally in special circumstances i.e. teardown.

Took 28 minutes

---------

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

cockatrice/src/game/arrow_registry.cpp

@@ -0,0 +1,48 @@
+#include "arrow_registry.h"
+
+#include "board/arrow_item.h"
+
+void ArrowRegistry::insert(QSharedPointer<ArrowData> data, ArrowItem *arrow)
+{
+    const ArrowKey key{data->creatorId, data->id};
+
+    if (auto *existing = take(data->creatorId, data->id)) {
+        existing->delArrow();
+    }
+
+    dataStore.insert(key, data);
+    items.insert(key, arrow);
+    byPlayer[data->creatorId].insert(data->id);
+}
+
+ArrowItem *ArrowRegistry::take(int creatorId, int arrowId)
+{
+    const ArrowKey key{creatorId, arrowId};
+    dataStore.remove(key);
+    auto &playerSet = byPlayer[creatorId];
+    playerSet.remove(arrowId);
+    if (playerSet.isEmpty()) {
+        byPlayer.remove(creatorId);
+    }
+    return items.take(key);
+}
+
+ArrowItem *ArrowRegistry::get(int creatorId, int arrowId) const
+{
+    return items.value(ArrowKey{creatorId, arrowId}, nullptr);
+}
+
+bool ArrowRegistry::contains(int creatorId, int arrowId) const
+{
+    return items.contains(ArrowKey{creatorId, arrowId});
+}
+
+QSet<int> ArrowRegistry::idsForPlayer(int playerId) const
+{
+    return byPlayer.value(playerId);
+}
+
+QList<ArrowItem *> ArrowRegistry::all() const
+{
+    return items.values();
+}