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/helicopter.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <title>helicopter</title> <path d="M30,8V6H8V8H18v4H4V8H2v8H4V14h6.2192l2.0533,8.2129A4.9923,4.9923,0,0,0,17.123,26H26a4.0045,4.0045,0,0,0,4-4V19.3623a2.0007,2.0007,0,0,0-.4639-1.28L25.0684,12.72A1.9968,1.9968,0,0,0,23.5317,12H20V8ZM26,24H17.123a2.9949,2.9949,0,0,1-2.91-2.2725L12.2808,14H18v6H28v2A2.0023,2.0023,0,0,1,26,24ZM23.5317,14l3.3333,4H20V14Z"/> </svg>