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/send.svg

@@ -0,0 +1 @@
+<svg id="icon" viewBox="0 0 32 32"><title>send</title><path d="M27.45,15.11l-22-11a1,1,0,0,0-1.08.12,1,1,0,0,0-.33,1L7,16,4,26.74A1,1,0,0,0,5,28a1,1,0,0,0,.45-.11l22-11a1,1,0,0,0,0-1.78Zm-20.9,10L8.76,17H18V15H8.76L6.55,6.89,24.76,16Z"/></svg>