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/text-highlight.svg

@@ -0,0 +1 @@
+<svg id="icon" viewBox="0 0 32 32"><title>text-highlight</title><path d="M12,15H5a3,3,0,0,1-3-3V10A3,3,0,0,1,5,7h5V5A1,1,0,0,0,9,4H3V2H9a3,3,0,0,1,3,3ZM5,9a1,1,0,0,0-1,1v2a1,1,0,0,0,1,1h5V9Z"/><path d="M20,23v2a1,1,0,0,0,1,1h5V22H21A1,1,0,0,0,20,23Z"/><path d="M2,30H30V2Zm26-2H21a3,3,0,0,1-3-3V23a3,3,0,0,1,3-3h5V18a1,1,0,0,0-1-1H19V15h6a3,3,0,0,1,3,3Z"/></svg>