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/dfsort-ibm-z-sort.svg

@@ -0,0 +1,2 @@
+<svg id="icon" version="1.1" viewBox="0 0 32 32"> <!-- Generator: Adobe Illustrator 29.6.1, SVG Export Plug-In . SVG Version: 2.1.1 Build 9) --> <path d="M10.6,24l1.4,1.4-5,5-5-5,1.4-1.4,2.6,2.6V2h2v24.6l2.6-2.6h0ZM14,2v2h16v-2H14ZM14,10h14v-2h-14v2ZM14,16h12v-2h-12v2ZM14,22h10v-2h-10v2ZM14,28h8v-2h-8v2Z"/> <rect id="__x3C_Transparent_Rectangle_x3E_" class="st0" width="32" height="32"/>
+</svg>