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/letter-Ee.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <path d="M25,19V15a2.0023,2.0023,0,0,0-2-2H19a2.0023,2.0023,0,0,0-2,2v6a2.0077,2.0077,0,0,0,2,2h5V21H19V19Zm-6-4h4v2H19Z"/> <polygon points="15 11 15 9 7 9 7 23 15 23 15 21 9 21 9 17 14 17 14 15 9 15 9 11 15 11"/> </svg>