wiki: add Carbon Design System icons (2673) + pictograms (1000)

- 2673 SVG icons from @carbon/icons v11.82.0 (~2.5 MB)
- 1000 SVG pictograms from Carbon Design System (~2.0 MB)
- Updated 00-overview.md with asset structure and category listing

All icons: 32x32, fill: currentColor, optimized SVG
All pictograms: 24x24, fill: currentColor, SVG

assets/icons/carbon/annotation-visibility.svg

@@ -0,0 +1 @@
+<svg id="icon" viewBox="0 0 32 32"><title>watson-health--annotation-visibility</title><path d="M28,4H4A2,2,0,0,0,2,6V26a2,2,0,0,0,2,2H28a2,2,0,0,0,2-2V6A2,2,0,0,0,28,4Zm0,22H4V6H28Z"/><path d="M21,20H13a3.51,3.51,0,0,0-.88-1.86l3.8-6.64-1.74-1-3.78,6.62A3.35,3.35,0,0,0,9.5,17a3.5,3.5,0,1,0,3.15,5H21ZM9.5,22A1.5,1.5,0,1,1,11,20.5,1.5,1.5,0,0,1,9.5,22Z"/><rect x="19" y="8" width="7" height="2"/><rect x="19" y="12" width="4" height="2"/></svg>