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/router.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <polygon points="21 7 16 2 11 7 12.409 8.419 15 5.847 15 13 17 13 17 5.794 19.591 8.419 21 7"/> <polygon points="21 25 16 30 11 25 12.409 23.581 15 26.153 15 19 17 19 17 26.206 19.591 23.581 21 25"/> <polygon points="24 11 19 16 24 21 25.419 19.591 22.847 17 30 17 30 15 22.794 15 25.419 12.409 24 11"/> <polygon points="8 11 13 16 8 21 6.581 19.591 9.153 17 2 17 2 15 9.206 15 6.581 12.409 8 11"/> </svg>