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/toggle-off.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="M22,23.991h-12c-4.4111,0-8-3.5887-8-8s3.5889-8,8-8h12c4.4111,0,8,3.5887,8,8s-3.5889,8-8,8ZM10,9.991c-3.3086,0-6,2.6917-6,6s2.6914,6,6,6h12c3.3086,0,6-2.6917,6-6s-2.6914-6-6-6c0,0-12,0-12,0ZM13,15.991c0-1.6569-1.3431-3-3-3s-3,1.3431-3,3,1.3431,3,3,3,3-1.3431,3-3Z"/> <rect id="__x3C_Transparent_Rectangle_x3E_" class="st0" width="32" height="32"/>
+</svg>