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/wifi.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"><title>wifi</title><circle cx="16" cy="25" r="2"/><path d="M10.47,19.2334l1.4136,1.4131a5.9688,5.9688,0,0,1,8.2229-.0093L21.52,19.2236a7.9629,7.9629,0,0,0-11.05.01Z"/><path d="M6.229,14.9927l1.4136,1.4135a11.955,11.955,0,0,1,16.7041-.01L25.76,14.9829a13.9514,13.9514,0,0,0-19.5313.01Z"/><path d="M30,10.7412a19.94,19.94,0,0,0-28,0v.0225L3.4043,12.168a17.9336,17.9336,0,0,1,25.1811-.01L30,10.7432Z"/></svg>