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/layers.svg

@@ -0,0 +1 @@
+<svg id="Layer_1" data-name="Layer 1" width="32" height="32" viewBox="0 0 32 32"> <path d="M16,24a.9967.9967,0,0,1-.4741-.12l-13-7L3.4741,15.12,16,21.8643,28.5259,15.12l.9482,1.7607-13,7A.9967.9967,0,0,1,16,24Z" transform="translate(0 0)"/> <path d="M16,30a.9967.9967,0,0,1-.4741-.12l-13-7L3.4741,21.12,16,27.8643,28.5259,21.12l.9482,1.7607-13,7A.9967.9967,0,0,1,16,30Z" transform="translate(0 0)"/> <path d="M16,18a.9967.9967,0,0,1-.4741-.12l-13-7a1,1,0,0,1,0-1.7607l13-7a.9982.9982,0,0,1,.9482,0l13,7a1,1,0,0,1,0,1.7607l-13,7A.9967.9967,0,0,1,16,18ZM5.1094,10,16,15.8643,26.8906,10,16,4.1358Z" transform="translate(0 0)"/> </svg>