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/document-attachment.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <path d="M26,30H11a2.0023,2.0023,0,0,1-2-2V22h2v6H26V6H17V4h9a2.0023,2.0023,0,0,1,2,2V28A2.0023,2.0023,0,0,1,26,30Z"/> <rect x="17" y="10" width="7" height="2"/> <rect x="16" y="15" width="8" height="2"/> <rect x="15" y="20" width="9" height="2"/> <path d="M9,19a5.0055,5.0055,0,0,1-5-5V3H6V14a3,3,0,0,0,6,0V5a1,1,0,0,0-2,0V15H8V5a3,3,0,0,1,6,0v9A5.0055,5.0055,0,0,1,9,19Z"/> </svg>