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/group.svg

@@ -0,0 +1 @@
+<svg id="icon" viewBox="0 0 32 32"><title>group</title><path d="M31,30H29V27a3,3,0,0,0-3-3H22a3,3,0,0,0-3,3v3H17V27a5,5,0,0,1,5-5h4a5,5,0,0,1,5,5Z" transform="translate(0)"/><path d="M24,12a3,3,0,1,1-3,3,3,3,0,0,1,3-3m0-2a5,5,0,1,0,5,5A5,5,0,0,0,24,10Z" transform="translate(0)"/><path d="M15,22H13V19a3,3,0,0,0-3-3H6a3,3,0,0,0-3,3v3H1V19a5,5,0,0,1,5-5h4a5,5,0,0,1,5,5Z" transform="translate(0)"/><path d="M8,4A3,3,0,1,1,5,7,3,3,0,0,1,8,4M8,2a5,5,0,1,0,5,5A5,5,0,0,0,8,2Z" transform="translate(0)"/></svg>