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/previous-outline.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <polygon points="16 8 17.43 9.393 11.85 15 24 15 24 17 11.85 17 17.43 22.573 16 24 8 16 16 8"/> <path d="M16,30A14,14,0,1,1,30,16,14.0158,14.0158,0,0,1,16,30ZM16,4A12,12,0,1,0,28,16,12.0137,12.0137,0,0,0,16,4Z"/> </svg>