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>

assets/icons/dim_angular.svg

@@ -0,0 +1,11 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="64" height="64">
+  <!-- Two lines forming an angle -->
+  <line x1="4" y1="20" x2="20" y2="20" stroke="#e0e0e0" stroke-width="1.5" stroke-linecap="round"/>
+  <line x1="4" y1="20" x2="14" y2="6" stroke="#e0e0e0" stroke-width="1.5" stroke-linecap="round"/>
+  <!-- Arc dimension -->
+  <path d="M 16 20 A 12 12 0 0 0 10.8 10.4" stroke="#4cc9f0" stroke-width="1.5" fill="none" stroke-linecap="round"/>
+  <!-- Arrow at arc end -->
+  <polygon points="10.8,10.4 13.2,11.2 11.6,13" fill="#4cc9f0"/>
+  <!-- Angle label -->
+  <text x="17" y="16" font-size="4.5" fill="#4cc9f0" font-family="monospace">∠</text>
+</svg>