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.svg

@@ -0,0 +1 @@
+<svg id="icon" viewBox="0 0 32 32"><title>video</title><path d="M21,26H4a2,2,0,0,1-2-2V8A2,2,0,0,1,4,6H21a2,2,0,0,1,2,2v4.06l5.42-3.87A1,1,0,0,1,30,9V23a1,1,0,0,1-1.58.81L23,19.94V24A2,2,0,0,1,21,26ZM4,8V24H21V18a1,1,0,0,1,1.58-.81L28,21.06V10.94l-5.42,3.87A1,1,0,0,1,21,14V8Z"/></svg>