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/accessibility.svg

@@ -0,0 +1 @@
+<svg id="icon" viewBox="0 0 32 32"><title>accessibility</title><path d="M29.55,26.11,26.5,27.63,23.66,21H15a2,2,0,0,1-2-2V13a2,2,0,0,1,4,0v4h7V15H19V13a4,4,0,0,0-8,0v1a9,9,0,1,0,8.77,11H17.71A7,7,0,1,1,11,16v3a4,4,0,0,0,4,4h7.34l3.16,7.37,4.95-2.48Z"/><path d="M15.5,8A3.5,3.5,0,1,1,19,4.5,3.5,3.5,0,0,1,15.5,8Zm0-5A1.5,1.5,0,1,0,17,4.5,1.5,1.5,0,0,0,15.5,3Z"/></svg>