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/temperature-celsius-alt.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <path d="M26,27H17a2.0023,2.0023,0,0,1-2-2V11a2.002,2.002,0,0,1,2-2h9v2H17V25h9Z" transform="translate(0 0)"/> <path d="M8,13a4,4,0,1,1,4-4h0A4.0118,4.0118,0,0,1,8,13ZM8,7a2,2,0,1,0,2,2h0A2.0059,2.0059,0,0,0,8,7Z" transform="translate(0 0)"/> </svg>