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/shape-intersect.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <path d="M28,10H22V4a2.0025,2.0025,0,0,0-2-2H4A2.0025,2.0025,0,0,0,2,4V20a2.0025,2.0025,0,0,0,2,2h6v6a2.0025,2.0025,0,0,0,2,2H28a2.0025,2.0025,0,0,0,2-2V12A2.0025,2.0025,0,0,0,28,10ZM4,20V4H20v6H12a2.0025,2.0025,0,0,0-2,2v8Zm8,8V22h8a2.0025,2.0025,0,0,0,2-2V12h6V28Z"/> </svg>