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/switch-layer-3.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <polygon points="22 4 22 6 24.586 6 19.586 11 21 12.414 26 7.414 26 10 28 10 28 4 22 4"/> <polygon points="10 4 10 6 7.414 6 12.414 11 11 12.414 6 7.414 6 10 4 10 4 4 10 4"/> <polygon points="20 5 16 1 12 5 13.414 6.414 15 4.829 15 11 17 11 17 4.829 18.586 6.414 20 5"/> <polygon points="22 28 22 26 24.586 26 19.586 21 21 19.586 26 24.586 26 22 28 22 28 28 22 28"/> <polygon points="10 28 10 26 7.414 26 12.414 21 11 19.586 6 24.586 6 22 4 22 4 28 10 28"/> <polygon points="20 27 16 31 12 27 13.414 25.586 15 27.171 15 21 17 21 17 27.171 18.586 25.586 20 27"/> <polygon points="5 12 1 16 5 20 6.414 18.586 4.829 17 11 17 11 15 4.829 15 6.414 13.414 5 12"/> <polygon points="27 12 31 16 27 20 25.586 18.586 27.171 17 21 17 21 15 27.171 15 25.586 13.414 27 12"/> </svg>