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/help-desk.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"><title>help-desk</title><path d="M27,10H21a3.0033,3.0033,0,0,0-3,3v6a2.0023,2.0023,0,0,0,2,2v7a2.0023,2.0023,0,0,0,2,2h4a2.0023,2.0023,0,0,0,2-2V21a2.0023,2.0023,0,0,0,2-2V13A3.0033,3.0033,0,0,0,27,10Zm1,9H26v9H22V19H20V13a1.0009,1.0009,0,0,1,1-1h6a1.0009,1.0009,0,0,1,1,1Z"/><path d="M20,5a4,4,0,1,1,4,4A4.0042,4.0042,0,0,1,20,5Zm2,0a2,2,0,1,0,2-2A2.0023,2.0023,0,0,0,22,5Z"/><path d="M14,16V13a3.0033,3.0033,0,0,0-3-3H5a3.0033,3.0033,0,0,0-3,3v3H0v2H16V16ZM4,13a1.0009,1.0009,0,0,1,1-1h6a1.0009,1.0009,0,0,1,1,1v3H4Z"/><path d="M4,5A4,4,0,1,1,8,9,4.0042,4.0042,0,0,1,4,5ZM6,5A2,2,0,1,0,8,3,2.0023,2.0023,0,0,0,6,5Z"/></svg>