Addons: export BatchedMesh (#27003)

* Addons: export BatchedMesh

* Addons: cleanup

examples/jsm/Addons.js

@@ -159,6 +159,7 @@ export * from './modifiers/EdgeSplitModifier.js';
 export * from './modifiers/SimplifyModifier.js';
 export * from './modifiers/TessellateModifier.js';
 
+export * from './objects/BatchedMesh.js';
 export * from './objects/GroundProjectedSkybox.js';
 export * from './objects/Lensflare.js';
 export * from './objects/MarchingCubes.js';