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/ibm-cloud-virtual-server-vpc.svg

@@ -0,0 +1,2 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <circle cx="8" cy="26" r="1"/> <path d="m5,30h22c1.1,0,2-.9,2-2v-4c0-1.1-.9-2-2-2H5c-1.1,0-2,.9-2,2v4c0,1.1.9,2,2,2Zm0-6h22v4H5v-4Z"/> <path d="m23,20h-14c-3.31,0-6-2.69-6-6,0-3.05,2.29-5.58,5.25-5.95.88-3.5,4.08-6.05,7.75-6.05s6.87,2.55,7.75,6.05c2.96.37,5.25,2.9,5.25,5.95,0,3.31-2.69,6-6,6Zm-14.05-10c-2.18.03-3.95,1.81-3.95,4,0,2.21,1.79,4,4,4h14c2.21,0,4-1.79,4-4,0-2.19-1.76-3.97-3.94-4l-.12.01-.88.02-.12-.88c-.43-2.94-2.98-5.15-5.94-5.15s-5.51,2.21-5.93,5.15l-.12.88-1-.03Z"/> <g id="_Transparent_Rectangle_" data-name="&amp;lt;Transparent Rectangle&amp;gt;"> <rect class="cls-1" width="32" height="32"/> </g>
+</svg>