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/API-1.svg

@@ -0,0 +1 @@
+<svg id="icon" viewBox="0 0 32 32"><title>API</title><path d="M8,9H4a2,2,0,0,0-2,2V23H4V18H8v5h2V11A2,2,0,0,0,8,9ZM4,16V11H8v5Z" transform="translate(0 0)"/><polygon points="22 11 25 11 25 21 22 21 22 23 30 23 30 21 27 21 27 11 30 11 30 9 22 9 22 11"/><path d="M14,23H12V9h6a2,2,0,0,1,2,2v5a2,2,0,0,1-2,2H14Zm0-7h4V11H14Z" transform="translate(0 0)"/></svg>