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/pivot-vertical.svg

@@ -0,0 +1,2 @@
+<svg id="icon" version="1.1" viewBox="0 0 32 32"> <!-- Generator: Adobe Illustrator 29.5.1, SVG Export Plug-In . SVG Version: 2.1.0 Build 141) --> <path d="M28,2H4c-1.1,0-2,.9-2,2v24c0,1.1.9,2,2,2h24c1.1,0,2-.9,2-2V4c0-1.1-.9-2-2-2ZM28,28H4V8h24v20ZM28,6H4v-2h24v2ZM22,10h2v16h-2v-16ZM15,14l5,5-5,5-1.4-1.4,2.6-2.6h-6.2c-1.1,0-2-.9-2-2v-6h2v6h6.2l-2.6-2.6,1.4-1.4Z"/> <rect id="__x3C_Transparent_Rectangle_x3E_" class="st0" width="32" height="32"/>
+</svg>