feat(tablestyle): add Annotative toggle to the Table Style editor

The table-style details panel gains an Annotative checkbox that flips the
new TableStyle.annotative flag, rounding out annotative across the Text,
Dimension and Table style editors.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/app/mod.rs

@@ -898,6 +898,8 @@ pub enum Message {
     TableStyleDialogSelect(String),
     TableStyleDialogNew,
     TableStyleDialogDelete,
+    /// Toggle the Annotative flag on the selected table style.
+    TableStyleToggleAnnotative,
     // ── MLineStyle Dialog ─────────────────────────────────────────────────
     MlStyleDialogOpen,
     #[allow(dead_code)]