feat: implement asynchronous asset management system with texture streaming support

src/Runtime/Ghost.Core/Common.cs

@@ -0,0 +1,15 @@
+namespace Ghost.Core;
+
+public enum AssetType : byte
+{
+    Texture = 0,
+    Mesh = 1,
+    Material = 2,
+    Shaders = 3,
+    Audio = 4,
+    Scene = 5,
+    Video = 6,
+    Json = 7,
+
+    Unknown = 64,
+}