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/this-side-up.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <rect x="2" y="28" width="28" height="2"/> <polygon points="7 5.828 7 24 9 24 9 5.828 12.586 9.414 14 8 8 2 2 8 3.414 9.414 7 5.828"/> <polygon points="23 5.828 23 24 25 24 25 5.828 28.586 9.414 30 8 24 2 18 8 19.414 9.414 23 5.828"/> </svg>