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/function-math.svg

@@ -0,0 +1,2 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <polygon points="26 18 24 18 22 21.897 20 18 18 18 20.905 23 18 28 20 28 22 24.201 24 28 26 28 23.098 23 26 18"/> <path class="cls-1" d="M19,6V4H13.9133a1.9906,1.9906,0,0,0-1.9919,1.8188L11.2686,13H7v2h4.0867l-1,11H5v2h5.0867a1.9906,1.9906,0,0,0,1.9919-1.8188L13.0952,15H18V13H13.2769l.6364-7Z"/> <rect id="_Transparent_Rectangle" data-name=" Transparent Rectangle" class="cls-2" width="32" height="32"/>
+</svg>