Add Asset system

- Add Abstract Asset class which defines Assets
- Add AssetManager class to keep track of all the Asset
- Add AssetFile class to cache the asset without loading it
- Add UUID class to uniquely identify assets
- Add MetaFile class to load meta asset files

CopiumEngine/src/copium/asset/Asset.h

@@ -0,0 +1,30 @@
+#pragma once
+
+#include "copium/asset/AssetMeta.h"
+#include "copium/util/MetaFile.h"
+#include "copium/util/UUID.h"
+
+#include <stdint.h>
+
+namespace Copium
+{
+
+  class Asset
+  {
+    friend class AssetManager;
+  public:
+    Asset(AssetType type);
+    virtual ~Asset();
+
+    AssetHandle GetHandle() const;
+    AssetType GetType() const;
+    const std::string& GetName() const;
+    UUID GetUUID() const;
+    bool isRuntime() const;
+
+    operator AssetHandle() const;
+
+  private:
+    AssetMeta metaData;
+  };
+}