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/folder.svg

@@ -0,0 +1 @@
+<svg id="icon" viewBox="0 0 32 32"><title>folder</title><path d="M11.17,6l3.42,3.41.58.59H28V26H4V6h7.17m0-2H4A2,2,0,0,0,2,6V26a2,2,0,0,0,2,2H28a2,2,0,0,0,2-2V10a2,2,0,0,0-2-2H16L12.59,4.59A2,2,0,0,0,11.17,4Z" transform="translate(0)"/></svg>