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/cloud-alerting.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <path d="M28,17v5H4V6H15V4H4A2,2,0,0,0,2,6V22a2,2,0,0,0,2,2h8v4H8v2H24V28H20V24h8a2,2,0,0,0,2-2V17ZM18,28H14V24h4Z" transform="translate(0 0)"/> <path d="M29,14H17a1,1,0,0,1-.8574-1.5144l6-10a1,1,0,0,1,1.7154,0l6,10A1,1,0,0,1,29,14ZM18.7661,12h8.4678L23,4.9436Z" transform="translate(0 0)"/> </svg>