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/right-panel-close.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <path class="cls-2" d="m2,6v20c0,1.1045.8955,2,2,2h24c1.1045,0,2-.8955,2-2V6c0-1.1045-.8955-2-2-2H4c-1.1045,0-2,.8955-2,2Zm20,0h6v20h-6V6Zm-18,0h16v20H4v-9h10.1699s-3.5801,3.5898-3.5801,3.5898l1.4102,1.4102,6-6-6-6-1.4102,1.4102,3.5801,3.5898H4V6Z"/> </svg>