feat: redesign Annotate ribbon tab with proper groups and SVG icons

Added 15 SVG icons for all annotation tools (dimensions, leaders,
table, wipeout, revision cloud, tolerance, ddedit).

Annotate ribbon now has 6 groups matching standard CAD layout:
- Text: MText (large dropdown) + Text + Edit Text
- Dimensions: Linear (large dropdown with 6 types) + Continue + Baseline + Tolerance
- Leaders: Multileader (large dropdown) + Leader
- Tables: Table (large)
- Markup: Wipeout + Rev Cloud
- Annotation Scaling: Scale List, Add Scale, Scale Edit, Sync Scales

Added pub tool() + ICON to all annotate tools that were missing them
(aligned_dim, diameter_dim, dim_continue, dim_baseline, table_cmd,
tolerance_cmd, ddedit), and to home/draw/wipeout and revcloud.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/modules/annotate/ordinate_dim.rs

@@ -21,7 +21,7 @@ pub fn tool() -> ToolDef {
     ToolDef {
         id: "DIMORDINATE",
         label: "Ordinate",
-        icon: IconKind::Glyph("Φ"),
+        icon: IconKind::Svg(include_bytes!("../../../assets/icons/dim_ordinate.svg")),
         event: ModuleEvent::Command("DIMORDINATE".to_string()),
     }
 }