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/partly-cloudy.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"><title>partly-cloudy</title><rect x="27" y="15" width="4" height="2"/><rect x="23.0857" y="5.7938" width="4.2426" height="1.9998" transform="translate(2.5791 19.8139) rotate(-45)"/><rect x="15" y="1" width="2" height="4"/><rect x="4.6716" y="24.2078" width="4.2426" height="1.9998" transform="translate(-15.8349 12.1865) rotate(-45)"/><rect x="5.7931" y="4.6723" width="1.9998" height="4.2426" transform="translate(-2.8142 6.7932) rotate(-45)"/><rect x="1" y="15" width="4" height="2"/><path d="M26.7939,20.3418a6.9617,6.9617,0,0,0-1.8681-3.2671A8.485,8.485,0,0,0,25,16a9,9,0,1,0-14.585,7.0332A4.9771,4.9771,0,0,0,15,30H25a4.9947,4.9947,0,0,0,1.7939-9.6582ZM9,16a6.9955,6.9955,0,0,1,13.9849-.2969A6.8883,6.8883,0,0,0,20,15a7.04,7.04,0,0,0-6.7944,5.3418A4.986,4.986,0,0,0,11.5618,21.39,6.9675,6.9675,0,0,1,9,16ZM25,28H15a2.9945,2.9945,0,0,1-.6963-5.9082l.6587-.1572.0986-.67a4.9923,4.9923,0,0,1,9.878,0l.0986.6695.6587.1572A2.9945,2.9945,0,0,1,25,28Z"/></svg>