@

Add MrGameEng.AI utility-AI module; format codebase with CSharpier

New MrGameEng.AI module (ResponseCurve, Consideration, UtilityAction,
UtilityAi selector, Blackboard) plus CSharpier formatting applied across
the whole engine. Documents the CSharpier convention in CLAUDE.md.
@

src/MrGameEng.Graphics/SpriteSortKey.cs

@@ -9,7 +9,9 @@ public static class SpriteSortKey
 {
     /// <summary>Composes a sort key from layer, depth and texture grouping key.</summary>
     public static ulong Make(byte layer, float depth, int textureKey) =>
-        ((ulong)layer << 56) | ((ulong)DepthToSortableBits(depth) << 24) | ((uint)textureKey & 0xFF_FFFF);
+        ((ulong)layer << 56)
+        | ((ulong)DepthToSortableBits(depth) << 24)
+        | ((uint)textureKey & 0xFF_FFFF);
 
     /// <summary>
     /// Maps a float to bits whose unsigned order matches the float order