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/nominal.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"><title>nominal</title><path d="M24,28a6,6,0,1,1,6-6A6.0069,6.0069,0,0,1,24,28Zm0-10a4,4,0,1,0,4,4A4.0045,4.0045,0,0,0,24,18Z"/><path d="M8,28a6,6,0,1,1,6-6A6.0069,6.0069,0,0,1,8,28ZM8,18a4,4,0,1,0,4,4A4.0045,4.0045,0,0,0,8,18Z"/><path d="M16,14a6,6,0,1,1,6-6A6.0069,6.0069,0,0,1,16,14ZM16,4a4,4,0,1,0,4,4A4.0045,4.0045,0,0,0,16,4Z"/></svg>