rename float-packing to number-packing

src/extensions/geo-export/mesh-exporter.ts

src/mol-canvas3d/passes/pick.ts

src/mol-geo/geometry/size-data.ts

src/mol-gl/compute/histogram-pyramid/sum.ts

src/mol-math/geometry/gaussian-density/gpu.ts

src/mol-repr/volume/slice.ts

src/mol-repr/volume/util.ts

src/mol-util/number-packing.ts