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/omega.svg

@@ -0,0 +1 @@
+<svg id="Layer_1" data-name="Layer 1" width="32" height="32" viewBox="0 0 32 32"> <path d="M22.7373,25A14.3093,14.3093,0,0,0,27,15C27,8.42,22.58,4,16,4S5,8.42,5,15A14.3093,14.3093,0,0,0,9.2627,25H4v2h8V24.7617A12.5683,12.5683,0,0,1,7,15c0-5.4673,3.5327-9,9-9s9,3.5327,9,9a12.5683,12.5683,0,0,1-5,9.7617V27h8V25Z" transform="translate(0 0)"/> </svg>