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/observed-hail.svg

@@ -0,0 +1 @@
+<svg id="Layer_1" data-name="Layer 1" width="32" height="32" viewBox="0 0 32 32"> <path d="M4,18A12,12,0,1,0,16,6H12V1L6,7l6,6V8h4A10,10,0,1,1,6,18Z" transform="translate(0 0)"/> <circle cx="13.5" cy="23.5" r="1.5"/> <circle cx="10.5" cy="19.5" r="1.5"/> <circle cx="16.5" cy="19.5" r="1.5"/> <rect x="11.9644" y="14.5001" width="5.0716" height="1.9994" transform="translate(-6.713 14.793) rotate(-45)"/> <rect x="17.9644" y="14.5001" width="5.0716" height="1.9994" transform="translate(-4.9556 19.0356) rotate(-45)"/> </svg>