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/user.svg

@@ -0,0 +1 @@
+<svg id="icon" viewBox="0 0 32 32"><title>user</title><path d="M16,4a5,5,0,1,1-5,5,5,5,0,0,1,5-5m0-2a7,7,0,1,0,7,7A7,7,0,0,0,16,2Z"/><path d="M26,30H24V25a5,5,0,0,0-5-5H13a5,5,0,0,0-5,5v5H6V25a7,7,0,0,1,7-7h6a7,7,0,0,1,7,7Z"/></svg>