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/drop-photo-filled.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"><title>drop-photo--filled</title><circle class="cls-1" cx="19" cy="22" r="2"/><path class="cls-1" d="M27,16H23.7207l-.5439-1.6328A1.9983,1.9983,0,0,0,21.2793,13H16.7207a1.9981,1.9981,0,0,0-1.8975,1.3677L14.2793,16H11a2.0023,2.0023,0,0,0-2,2v9a2.0023,2.0023,0,0,0,2,2H27a2.0023,2.0023,0,0,0,2-2V18A2.0023,2.0023,0,0,0,27,16ZM19,26a4,4,0,1,1,4-4A4.0045,4.0045,0,0,1,19,26Z"/><path id="inner-path" class="cls-2" d="M19,26a4,4,0,1,1,4-4A4.0045,4.0045,0,0,1,19,26Zm0-6a2,2,0,1,0,2,2A2.0021,2.0021,0,0,0,19,20Z"/><rect class="cls-1" x="27" y="11" width="2" height="2"/><rect class="cls-1" x="27" y="7" width="2" height="2"/><rect class="cls-1" x="27" y="3" width="2" height="2"/><rect class="cls-1" x="23" y="3" width="2" height="2"/><rect class="cls-1" x="19" y="3" width="2" height="2"/><rect class="cls-1" x="15" y="3" width="2" height="2"/><rect class="cls-1" x="11" y="3" width="2" height="2"/><rect class="cls-1" x="7" y="3" width="2" height="2"/><rect class="cls-1" x="3" y="3" width="2" height="2"/><rect class="cls-1" x="3" y="7" width="2" height="2"/><rect class="cls-1" x="3" y="11" width="2" height="2"/><rect class="cls-1" x="3" y="15" width="2" height="2"/><rect class="cls-1" x="3" y="19" width="2" height="2"/><rect class="cls-1" x="3" y="23" width="2" height="2"/><rect class="cls-1" x="3" y="27" width="2" height="2"/></svg>