Aeronautics:Gravity Visualization

This update overhauls the advancement tree — removing the simplification-items page and Spark Wand advancements, unhiding two items' advancements, re-parenting the "Pack Yourself" advancement, and fixing the "Crystallized?!" trigger firing too early; it also fixes a clipboard bug that could copy data between counterweight/ballast/stabilizer blocks, blocks Carry On's carrying behavior, adds particle gating for starlight casings and a special item effect for the levitite half-product, switches ClipboardScreenMixin to @ModifyExpressionValue to avoid injection conflicts.