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/triangle-outline.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <path class="cls-2" d="m29.8755,27.5117L16.856,3.5249c-.1865-.3438-.5212-.5249-.856-.5249-.3345,0-.6689.1812-.8555.5249L2.125,27.5117c-.0862.1582-.1255.3257-.125.4883.0017.5229.4114,1,.9805,1h26.0393c.5691,0,.9788-.4771.9802-1,.0005-.1626-.0386-.3301-.1245-.4883Zm-25.1985-.5117L16,6.1323l11.323,20.8677H4.677Z"/> </svg>