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/train-time.svg

@@ -0,0 +1 @@
+<svg id="Layer_1" data-name="Layer 1" width="32" height="32" viewBox="0 0 32 32"> <polygon id="_inner-path_" data-name="&lt;inner-path&gt;" class="cls-1" points="25.496 10.088 22.874 7.466 22.874 3 25.124 3 25.124 6.534 27.088 8.498 25.496 10.088"/> <path d="M24,1a6,6,0,1,0,6,6A6.0066,6.0066,0,0,0,24,1Zm1.4971,9.0884L22.875,7.4658V3h2.25V6.5342l1.9639,1.9634Z" transform="translate(0 0)"/> <path d="M6,16V10h9V8H6.1843A2.9948,2.9948,0,0,1,9,6h6V4H9A5.0057,5.0057,0,0,0,4,9V21a4.99,4.99,0,0,0,3.582,4.77L5.7693,30H7.9451l1.7143-4h8.6812l1.7143,4h2.1758L20.418,25.77A4.99,4.99,0,0,0,24,21V16Zm16,4H19v2h2.8157A2.9948,2.9948,0,0,1,19,24H9a2.9948,2.9948,0,0,1-2.8157-2H9V20H6V18H22Z" transform="translate(0 0)"/> </svg>