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-vpc-images.svg

@@ -0,0 +1,2 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <path d="M30,20H4c-1.1,0-2-.9-2-2V6c0-1.1.9-2,2-2h24c1.1,0,2,.9,2,2v10h-2V6H4v12h26v2ZM2,22h28v2H2v-2ZM2,26h28v2H2v-2ZM16,16c-2.2,0-4-1.8-4-4s1.8-4,4-4,4,1.8,4,4-1.8,4-4,4ZM16,10c-1.1,0-2,.9-2,2s.9,2,2,2,2-.9,2-2-.9-2-2-2ZM24,10c-1.1,0-2,.9-2,2s.9,2,2,2,2-.9,2-2-.9-2-2-2h0ZM8,10c-1.1,0-2,.9-2,2s.9,2,2,2,2-.9,2-2-.9-2-2-2h0Z"/> <rect id="_x3C_Transparent_Rectangle_x3E_" class="cls-1" width="32" height="32"/>
+</svg>