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/rain-scattered-night.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"><title>rain--scattered--night</title><path d="M8.5084,32a1.0115,1.0115,0,0,1-.4485-.1055.9986.9986,0,0,1-.4486-1.3418l1.4934-3a1.0025,1.0025,0,0,1,1.7943.8945l-1.4934,3A1.0015,1.0015,0,0,1,8.5084,32Z"/><path d="M29.8442,13.0347a1.5184,1.5184,0,0,0-1.2309-.8658,5.3587,5.3587,0,0,1-3.4094-1.7163,6.4648,6.4648,0,0,1-1.285-6.393,1.6031,1.6031,0,0,0-.3-1.5459,1.4535,1.4535,0,0,0-1.3594-.4922l-.0191.0029a7.8549,7.8549,0,0,0-6.1054,6.48A7.3725,7.3725,0,0,0,13.5,8a7.5511,7.5511,0,0,0-7.1494,5.2441A5.9926,5.9926,0,0,0,8,25h7.3818L14.106,27.5527a1,1,0,1,0,1.7885.8946L17.6177,25H19a5.9549,5.9549,0,0,0,5.88-7.1455,7.5,7.5,0,0,0,4.8672-3.3A1.5381,1.5381,0,0,0,29.8442,13.0347ZM19,23H8a3.9926,3.9926,0,0,1-.6733-7.9292l.663-.1128.1456-.6562a5.496,5.496,0,0,1,10.7294,0l.1456.6562.6626.1128A3.9925,3.9925,0,0,1,19,23Zm5.1509-7.0479a5.9639,5.9639,0,0,0-3.5015-2.708A7.5076,7.5076,0,0,0,18.0286,9.55a6.01,6.01,0,0,1,3.77-5.334,8.4581,8.4581,0,0,0,1.9395,7.5972A7.4007,7.4007,0,0,0,27.64,14.041,5.4392,5.4392,0,0,1,24.1509,15.9521Z"/></svg>