testing building some core systems

- serialization
- chunks
- parralelfor test

Nerfed.Runtime/Scene/Streaming/StreamingComponents.cs

@@ -0,0 +1,28 @@
+using MoonTools.ECS;
+using System.Numerics;
+
+namespace Nerfed.Runtime.Scene.Streaming;
+
+/// <summary>
+/// Marks an entity as a streaming observer (e.g. the player camera) that causes chunks
+/// to be loaded around it.
+/// </summary>
+public struct ChunkObserverComponent
+{
+    public float ViewRadius;
+}
+
+/// <summary>
+/// Tags an entity as belonging to a specific chunk, allowing it to be unloaded when the chunk is out of range.
+/// </summary>
+public struct ChunkMemberComponent
+{
+    // A 64-bit spatial hash combining the X, Y, and Z coordinates.
+    public long ChunkId;
+}
+
+/// <summary>
+/// Added to entities that belong to a chunk that has been unloaded. 
+/// A dedicated system will process and destroy these slowly over multiple frames.
+/// </summary>
+public struct ChunkUnloadPendingTag { }