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/edge-node.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <rect x="22" y="6" width="4" height="4"/> <circle cx="7" cy="7" r="1"/> <circle cx="25" cy="25" r="1"/> <circle cx="25" cy="21" r="1"/> <circle cx="25" cy="17" r="1"/> <path d="M22,17V15H20V14a2.0023,2.0023,0,0,0-2-2H17V10H15v2H13V10H11v2H10a2.0023,2.0023,0,0,0-2,2v1H6v2H8v2H6v2H8v1a2.0023,2.0023,0,0,0,2,2h1v2h2V24h2v2h2V24h1a2.0023,2.0023,0,0,0,2-2V21h2V19H20V17Zm-4,5H10V14h8Z"/> <path d="M28,30H4a2.0021,2.0021,0,0,1-2-2V4A2.0021,2.0021,0,0,1,4,2H28a2.0021,2.0021,0,0,1,2,2V28A2.0021,2.0021,0,0,1,28,30ZM4,4V28H28V4Z"/> </svg>