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/chart-t-sne.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <title>chart--t-sne</title> <circle cx="10" cy="20" r="2"/> <circle cx="10" cy="28" r="2"/> <circle cx="10" cy="14" r="2"/> <circle cx="28" cy="4" r="2"/> <circle cx="22" cy="6" r="2"/> <circle cx="28" cy="10" r="2"/> <circle cx="20" cy="12" r="2"/> <circle cx="28" cy="22" r="2"/> <circle cx="26" cy="28" r="2"/> <circle cx="20" cy="26" r="2"/> <circle cx="22" cy="20" r="2"/> <circle cx="16" cy="4" r="2"/> <circle cx="4" cy="24" r="2"/> <circle cx="4" cy="16" r="2"/> </svg>