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/catalog.svg

@@ -0,0 +1 @@
+<svg id="icon" viewBox="0 0 32 32"><title>catalog</title><path d="M26,2H8A2,2,0,0,0,6,4V8H4v2H6v5H4v2H6v5H4v2H6v4a2,2,0,0,0,2,2H26a2,2,0,0,0,2-2V4A2,2,0,0,0,26,2Zm0,26H8V24h2V22H8V17h2V15H8V10h2V8H8V4H26Z" transform="translate(0 0)"/><rect x="14" y="8" width="8" height="2"/><rect x="14" y="15" width="8" height="2"/><rect x="14" y="22" width="8" height="2"/></svg>