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/sub-volume.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <path d="M29.4741,19.12,23.6807,16l5.7934-3.12a1,1,0,0,0,0-1.7607l-13-7a.9982.9982,0,0,0-.9482,0l-13,7a1,1,0,0,0,0,1.7607L8.3193,16,2.5259,19.12a1,1,0,0,0,0,1.7607l13,7a.9995.9995,0,0,0,.9482,0l13-7a1,1,0,0,0,0-1.7607ZM16,6.1359,26.8906,12,16,17.8643,5.1094,12Zm0,19.7284L5.1094,20l5.3193-2.8642L15.5259,19.88a.9995.9995,0,0,0,.9482,0l5.0972-2.7446L26.8906,20Z"/> </svg>