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/chemistry.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"><title>chemistry</title><path d="M27.2314,23.6182,20,13.6748V4h2V2H10V4h2v9.6748L4.7686,23.6182A4.0183,4.0183,0,0,0,8.0186,30H23.9814a4.0183,4.0183,0,0,0,3.25-6.3818ZM14,14.3252V4h4V14.3252L20.6728,18H11.3272ZM23.9814,28H8.0186a2.0192,2.0192,0,0,1-1.6329-3.2061L9.8726,20H22.1274l3.4869,4.7939A2.0192,2.0192,0,0,1,23.9814,28Z" transform="translate(0 0)"/></svg>