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/table-add.svg

@@ -0,0 +1,2 @@
+<svg id="Icon" width="32" height="32" version="1.1" viewBox="0 0 32 32"> <!-- Generator: Adobe Illustrator 30.0.0, SVG Export Plug-In . SVG Version: 2.1.1 Build 123) --> <path d="M27,3H5c-1.1,0-2,.9-2,2v12h2v-6h10v18h2V11h10v7h-10v2h10v7h-10v2h10c1.1,0,2-.9,2-2V5c0-1.1-.9-2-2-2ZM27,9H5v-4h22v4ZM12,26h-4v4h-2v-4H2v-2h4v-4h2v4h4v2Z"/> <rect id="__x3C_Transparent_Rectangle_x3E_" class="st0" width="32" height="32"/>
+</svg>