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/ibm-software-watsonx-data-structured-import.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <path d="M30,26h-8.17l2.58,2.59-1.41,1.41-5-5,5-5,1.41,1.41-2.58,2.59h8.17v2ZM4,24h12v2H4c-1.1045,0-2-.8955-2-2V4c0-1.1045.8955-2,2-2h22c1.1045,0,2,.8955,2,2v14h-2v-9H4v15ZM4,7h22v-3H4v3ZM6,13h5v-2h-5v2ZM13,13h5v-2h-5v2ZM6,17h5v-2h-5v2ZM13,17h5v-2h-5v2ZM6,21h5v-2h-5v2ZM13,21h5v-2h-5v2Z"/> </svg>