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/flow-modeler-reference.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <path d="M30,30H22V22h8Zm-6-2h4V24H24Z"/> <polygon points="4 20 4 22 8.586 22 2 28.586 3.414 30 10 23.414 10 28 12 28 12 20 4 20"/> <path d="M19,11H13l-3,4,6,6,6-6Z"/> <path d="M24,17V15a4,4,0,0,0,0-8H12V5H24a6,6,0,0,1,0,12Z"/> <path d="M10,10H2V2h8ZM4,8H8V4H4Z"/> </svg>