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-fill.svg

@@ -0,0 +1 @@
+<svg id="icon" viewBox="0 0 32 32"><title>text-fill</title><rect x="4" y="26" width="24" height="4"/><path d="M26,14.54a1,1,0,0,0-.25-.69L17.17,4.33A1.09,1.09,0,0,0,17,4.2V2H15V5L4.32,14.74a1,1,0,0,0-.06,1.41l8.57,9.52a1,1,0,0,0,.69.33h.05a1,1,0,0,0,.68-.26L24,16.8V21a1,1,0,0,0,2,0V14.57S26,14.55,26,14.54Zm-12.35,9-7.23-8L15,7.67V12h2V7.13l6.59,7.33Z"/></svg>