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/migrate.svg

@@ -0,0 +1 @@
+<svg id="icon" viewBox="0 0 32 32"><title>migrate</title><path d="M26,2H6A2,2,0,0,0,4,4V8a2,2,0,0,0,2,2h9v6.17l-2.59-2.58L11,15l5,5,5-5-1.41-1.41L17,16.17V10h9a2,2,0,0,0,2-2V4A2,2,0,0,0,26,2ZM6,4h4V8H6ZM26,8H12V4H26Z"/><path d="M26,22H6a2,2,0,0,0-2,2v4a2,2,0,0,0,2,2H26a2,2,0,0,0,2-2V24A2,2,0,0,0,26,22ZM6,24H20v4H6Zm20,4H22V24h4Z"/></svg>