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/customer-service-filled.svg

@@ -0,0 +1,2 @@
+<svg id="Layer_1" data-name="Layer 1" width="32" height="32" viewBox="0 0 32 32"> <path d="M16,16c-3.866,0-7-3.134-7-7s3.134-7,7-7,7,3.134,7,7-3.134,7-7,7ZM22,17h1c2.2091,0,4-1.7909,4-4v-4h-2v4c0,1.1046-.8954,2-2,2h-1c-.5523,0-1,.4477-1,1h0c0,.5523.4477,1,1,1ZM19,18h-6c-3.866,0-7,3.134-7,7v5h20v-5c0-3.866-3.134-7-7-7Z"/>
+</svg>