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/fusion-blender.svg

@@ -0,0 +1 @@
+<svg id="icon" viewBox="0 0 32 32"><title>watson-health--fusion-blender</title><path d="M20,12H17V4h3V2H12V4h3v8H12a2,2,0,0,0-2,2v4a2,2,0,0,0,2,2h3v8H12v2h8V28H17V20h3a2,2,0,0,0,2-2V14A2,2,0,0,0,20,12Zm-8,6V14h8v4Z"/></svg>