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/categories.svg

@@ -0,0 +1 @@
+<svg id="icon" viewBox="0 0 32 32"><title>categories</title><path d="M6.76,6l.45.89L7.76,8H12v5H4V6H6.76m.62-2H3A1,1,0,0,0,2,5v9a1,1,0,0,0,1,1H13a1,1,0,0,0,1-1V7a1,1,0,0,0-1-1H9L8.28,4.55A1,1,0,0,0,7.38,4Z" transform="translate(0 0)"/><path d="M22.76,6l.45.89L23.76,8H28v5H20V6h2.76m.62-2H19a1,1,0,0,0-1,1v9a1,1,0,0,0,1,1H29a1,1,0,0,0,1-1V7a1,1,0,0,0-1-1H25l-.72-1.45a1,1,0,0,0-.9-.55Z" transform="translate(0 0)"/><path d="M6.76,19l.45.89L7.76,21H12v5H4V19H6.76m.62-2H3a1,1,0,0,0-1,1v9a1,1,0,0,0,1,1H13a1,1,0,0,0,1-1V20a1,1,0,0,0-1-1H9l-.72-1.45a1,1,0,0,0-.9-.55Z" transform="translate(0 0)"/><path d="M22.76,19l.45.89L23.76,21H28v5H20V19h2.76m.62-2H19a1,1,0,0,0-1,1v9a1,1,0,0,0,1,1H29a1,1,0,0,0,1-1V20a1,1,0,0,0-1-1H25l-.72-1.45a1,1,0,0,0-.9-.55Z" transform="translate(0 0)"/></svg>