[Replay] Show the history sidebar in replay tabs (#7613)

Add the Game History dock to the left of replay tabs, wire it to the replay timeline, and register it with the View menu and layout reset.

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

cockatrice/src/interface/widgets/replay/replay_widget.h

@@ -38,6 +38,11 @@ public:
 
     [[nodiscard]] const QList<int> &getReplayTimeline() const;
 
+    /**
+     * @brief Index of the last replay event the game state has processed, or -1 before the first event.
+     */
+    [[nodiscard]] int getLastProcessedEventIndex() const;
+
 public slots:
     void seekToEvent(int eventIndex);