tables.applyPreset

Apply a named visual preset to a table. Presets: "grid" (1pt black borders all around), "minimal" (no outer borders, hairline grey row separators + thicker bottom), "striped" (banded rows on, 0.5pt grey borders), "accent" (filled header row + thick accent top/bottom; defaults to dark blue, override with `accentColor`). Composes set_borders + set_style_options + header-row shading in one call. Available via the document API and `superdoc_mutations` (intentionally NOT exposed as a top-level action on `superdoc_table`. Agents should compose explicit set_borders / set_shading / set_style_options calls so they always pick concrete colors that match the document context).