riversong code showcase

Source/Riversong/Game/Rendering/WorldRenderingState.cs

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+using System.Collections.Generic;
+
+namespace DanieleMarotta.RiversongCodeShowcase
+{
+    public class WorldRenderingState
+    {
+        /// <summary>
+        ///     All terrain chunks. Use <see cref="AddTerrainChunk" /> to register new chunks with the rendering state.
+        /// </summary>
+        public List<TerrainChunk> TerrainChunks { get; } = new();
+
+        public TileHighlight TileHighlight { get; } = new();
+
+        public void AddTerrainChunk(TerrainChunk chunk)
+        {
+            TerrainChunks.Add(chunk);
+        }
+    }
+}