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/close.svg

@@ -0,0 +1,2 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <polygon points="17.4141 16 24 9.4141 22.5859 8 16 14.5859 9.4143 8 8 9.4141 14.5859 16 8 22.5859 9.4143 24 16 17.4141 22.5859 24 24 22.5859 17.4141 16"/> <g id="_Transparent_Rectangle_" data-name="&amp;lt;Transparent Rectangle&amp;gt;"> <rect class="cls-1" width="32" height="32"/> </g>
+</svg>