SplatViewer Antialiasing (#201)

* Enhance SplatViewer component by adding graphicsDeviceOptions for improved rendering performance

* Added changeset for SplatViewer initialization to ensure it starts without anti-aliasing.

Author: marklundin

.changeset/metal-pianos-remain.md

@@ -0,0 +1,5 @@
+---
+"@playcanvas/blocks": patch
+---
+
+Ensure SplatViewer is initialized without anti-aliasing

packages/blocks/src/splat-viewer/splat-viewer.tsx

@@ -215,7 +215,11 @@ export function SplatViewer( {
                 subscribe={subscribe}
             >
                 <Suspense fallback={<PosterComponent poster={poster} />} >
-                    <Application fillMode={FILLMODE_NONE} resolutionMode={RESOLUTION_AUTO} autoRender={false}>
+                    <Application 
+                        fillMode={FILLMODE_NONE} 
+                        resolutionMode={RESOLUTION_AUTO} 
+                        autoRender={false}
+                        graphicsDeviceOptions={{ antialias: false }}>
                         <SplatComponent src={src} onAssetProgress={onAssetProgress} variant={variant} />
                     </Application>
                     <TooltipProvider>