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/flight-schedule.svg

@@ -0,0 +1 @@
+<svg id="Layer_1" data-name="Layer 1" width="32" height="32" viewBox="0 0 32 32"> <path class="cls-1" d="M25,23l5,2V23l-5-2.5V18a1,1,0,0,0-2,0v2.5L18,23v2l5-2v3.5L21,28v1l3-1,3,1V28l-2-1.5Z" transform="translate(0 0)"/> <path class="cls-1" d="M26,4H22V2H20V4H12V2H10V4H6A2,2,0,0,0,4,6V26a2,2,0,0,0,2,2H16V26H6V6h4V8h2V6h8V8h2V6h4v7h2V6A2,2,0,0,0,26,4Z" transform="translate(0 0)"/> </svg>