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/video-chat.svg

@@ -0,0 +1 @@
+<svg id="icon" viewBox="0 0 32 32"><title>video--chat</title><rect x="8" y="12" width="9" height="2"/><rect x="8" y="17" width="5" height="2"/><path d="M21,26H4a2.0023,2.0023,0,0,1-2-2V8A2.0023,2.0023,0,0,1,4,6H21a2.0023,2.0023,0,0,1,2,2v4.0566l5.4189-3.87A.9995.9995,0,0,1,30,9V23a.9995.9995,0,0,1-1.5811.8135L23,19.9434V24A2.0023,2.0023,0,0,1,21,26ZM4,8V24.001L21,24V18a.9995.9995,0,0,1,1.5811-.8135L28,21.0566V10.9434l-5.4189,3.87A.9995.9995,0,0,1,21,14V8Z"/></svg>