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/digital-identity.svg

@@ -0,0 +1,2 @@
+<svg id="Icon" version="1.1" viewBox="0 0 32 32"> <!-- Generator: Adobe Illustrator 29.6.1, SVG Export Plug-In . SVG Version: 2.1.1 Build 9) --> <path d="M20,19v-1c0-1.7-1.3-3-3-3h-6c-1.7,0-3,1.3-3,3v7h2v-7c0-.5.4-1,1-1h6c.5,0,1,.5,1,1v1h2ZM10,10c0,2.2,1.8,4,4,4s4-1.8,4-4-1.8-4-4-4-4,1.8-4,4ZM16,10c0,1.1-.9,2-2,2s-2-.9-2-2,.9-2,2-2,2,.9,2,2ZM27,21c0,7.8-7.7,8-8,8v2c0,0,10-.2,10-10h-2ZM19,27c2.1,0,6-1.3,6-6h-2c0,3.9-3.6,4-4,4v2ZM5,3h18v16h2V3c0-1.1-.9-2-2-2H5c-1.1,0-2,.9-2,2v26c0,1.1.9,2,2,2h12v-2H5V3ZM20,21c.6,0,1,.4,1,1s-.4,1-1,1-1-.4-1-1,.4-1,1-1Z"/> <rect id="__x3C_Transparent_Rectangle_x3E_" class="st0" width="32" height="32"/>
+</svg>