Ranaming Forge to Spark and bug fixes

A name collision with an existing rendering engine went unnoticed and we're renaming the project. We apologize for the mistake and the inconvenience.

Bug fixes

• Fix compressed .ply files by gsplat not loading (#34) (@bolopenguin, @asundqui)
• Fix image quality rendering with mostly transparent splats (#36) (@hybridherbst, @@asundqui)
• Fix SplatMesh not rendering when it's a child of an Object3D (#38) (@dmarcos)