Export shadowWorldPosition from TSL

I think this is missing from mrdoob#30060?

src/nodes/TSL.js

@@ -131,6 +131,7 @@ export * from './gpgpu/AtomicFunctionNode.js';
 export * from './accessors/Lights.js';
 export * from './lighting/LightsNode.js';
 export * from './lighting/LightingContextNode.js';
+export * from "./lighting/ShadowBaseNode.js";
 export * from './lighting/ShadowNode.js';
 export * from './lighting/PointLightNode.js';