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/currency-yen.svg

@@ -0,0 +1,2 @@
+<svg id="Layer_1" data-name="Layer 1" width="32" height="32" viewBox="0 0 32 32"> <polygon points="24.271 5 22 5 16 16 10 5 7.729 5 13.794 16 8 16 8 18 15 18 15 21 8 21 8 23 15 23 15 27 17 27 17 23 24 23 24 21 17 21 17 18 24 18 24 16 18.206 16 24.271 5"/> <rect class="cls-1" width="32" height="32"/>
+</svg>