Brings assets/locales/es.json back to full coverage of en.json: 60 new
messages translated (motion study, CAM, DXF export progress, sweep rails,
threads, grid follows the view) plus 13 terminology revisions (Loft,
Boss, timeline marker, viewport, ellipsis), all following the glossary.
It also unifies the snap label, as asked in the review of this pull
request: ui.snap (Snap) and cmd.sketch_snap (Snap Inference) now share a
single name, "Referencia a objetos".
Built on top of current main, so the three messages upstream had already
translated in es.json (Direction, In plane, Normal to sketch) are kept.
Co-authored-by: carlymx <[email protected]>
Co-authored-by: bherbruck <[email protected]>
