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/zos-partition.svg

@@ -0,0 +1 @@
+<svg id="Layer_1" version="1.1" viewBox="0 0 32 32"> <!-- Generator: Adobe Illustrator 30.4.0, SVG Export Plug-In . SVG Version: 2.1.4 Build 226) --> <path id="zos--partition" d="M26,28H6c-1.1,0-2-.9-2-2V6c0-1.1.9-2,2-2h20c1.1,0,2,.9,2,2v20c0,1.1-.9,2-2,2ZM7.4,26h18.6V7.4S7.4,26,7.4,26ZM6,6v18.6L24.6,6H6Z"/> </svg>