Cog Sample: Adding more gameplay

Cog Sample: Make Area a component instead of an actor
Cog Sample: Add Basic actor for Projectiles, Areas, etc...
Cog Sample: Start to add Projectile
Cog Sample: Start to add SpawnPrediction

Source/CogSample/CogSampleProgressionLevelInterface.h

@@ -0,0 +1,23 @@
+#pragma once
+
+#include "CoreMinimal.h"
+#include "CogSampleProgressionLevelInterface.generated.h"
+
+//--------------------------------------------------------------------------------------------------------------------------
+UINTERFACE(MinimalAPI, Blueprintable)
+class UCogSampleProgressionLevelInterface : public UInterface
+{
+    GENERATED_BODY()
+};
+
+//--------------------------------------------------------------------------------------------------------------------------
+class ICogSampleProgressionLevelInterface
+{
+    GENERATED_BODY()
+
+public:
+
+    virtual int32 GetProgressionLevel() const { return 0; }
+
+    virtual void SetProgressionLevel(int32) { }
+};