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/uv-index-filled.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <title>uv-index--filled</title> <path d="M16,30l-3.4634-5.8223L6,26l1.8223-6.5369L2,16l5.8223-3.4631L6,6l6.5366,1.8223L16,2l3.4634,5.8223L26,6l-1.8223,6.5369L30,16l-5.8223,3.4631L26,26l-6.5366-1.8223Z"/> </svg>