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/equalizer.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <rect x="2" y="28" width="8" height="2"/> <rect x="2" y="24" width="8" height="2"/> <rect x="12" y="28" width="8" height="2"/> <rect x="12" y="24" width="8" height="2"/> <rect x="2" y="20" width="8" height="2"/> <rect x="12" y="20" width="8" height="2"/> <rect x="2" y="16" width="8" height="2"/> <rect x="12" y="16" width="8" height="2"/> <rect x="12" y="12" width="8" height="2"/> <rect x="12" y="8" width="8" height="2"/> <rect x="12" y="4" width="8" height="2"/> <rect x="22" y="28" width="8" height="2"/> <rect x="22" y="24" width="8" height="2"/> </svg>