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/code-hide.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <polygon points="17.713 13.471 19.576 6.518 17.645 6 16.08 11.838 17.713 13.471"/> <polygon points="24.207 19.965 25.621 21.379 31 16 24 9 22.586 10.414 28.172 16 24.207 19.965"/> <polygon points="30 28.586 3.414 2 2 3.414 7.793 9.207 1 16 8 23 9.414 21.586 3.828 16 9.207 10.621 14.884 16.298 12.423 25.482 14.355 26 16.517 17.931 28.586 30 30 28.586"/> </svg>