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/tolerance.svg

@@ -0,0 +1,13 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="64" height="64">
+  <!-- GD&T frame box -->
+  <rect x="2" y="8" width="20" height="8" rx="0.5" stroke="#4cc9f0" stroke-width="1.5" fill="none"/>
+  <!-- Vertical dividers -->
+  <line x1="8" y1="8" x2="8" y2="16" stroke="#4cc9f0" stroke-width="1"/>
+  <line x1="14" y1="8" x2="14" y2="16" stroke="#4cc9f0" stroke-width="1"/>
+  <!-- Symbols -->
+  <text x="4" y="14.5" font-size="6" fill="#e0e0e0" font-family="monospace" text-anchor="middle">⊙</text>
+  <text x="11" y="14" font-size="4.5" fill="#e0e0e0" font-family="monospace" text-anchor="middle">0.1</text>
+  <text x="17" y="14" font-size="5" fill="#e0e0e0" font-family="monospace" text-anchor="middle">A</text>
+  <!-- Leader/datum triangle -->
+  <polygon points="12,4 10,8 14,8" fill="#4cc9f0"/>
+</svg>