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/blog.svg

@@ -0,0 +1 @@
+<svg id="icon" viewBox="0 0 32 32"><title>blog</title><rect x="4" y="24" width="10" height="2"/><rect x="4" y="18" width="10" height="2"/><path d="M26,14H6a2,2,0,0,1-2-2V6A2,2,0,0,1,6,4H26a2,2,0,0,1,2,2v6A2,2,0,0,1,26,14ZM6,6v6H26V6Z" transform="translate(0 0)"/><path d="M26,28H20a2,2,0,0,1-2-2V20a2,2,0,0,1,2-2h6a2,2,0,0,1,2,2v6A2,2,0,0,1,26,28Zm-6-8v6h6V20Z" transform="translate(0 0)"/></svg>