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/ai-label.svg

@@ -0,0 +1,2 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <path d="M19,21v-2h1v-7h-1v-2h4v2h-1v7h1v2h-4Z"/> <path d="M15.5005,21h2l-3.5005-11h-3l-3.4966,11h1.9988l.6018-2h4.7781l.6184,2ZM10.7058,17l1.6284-5.4111.2559-.0024,1.6736,5.4136h-3.5579Z"/> <path d="M32,32H0V0h32v32ZM2,30h28V2H2v28Z"/> <rect id="_x3C_Transparent_Rectangle_x3E_" class="cls-1" width="32" height="32"/>
+</svg>