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/calculator.svg

@@ -0,0 +1 @@
+<svg id="icon" viewBox="0 0 32 32"><title>calculator</title><path d="M26,4V28H6V4H26m0-2H6A2,2,0,0,0,4,4V28a2,2,0,0,0,2,2H26a2,2,0,0,0,2-2V4A2,2,0,0,0,26,2Z"/><rect x="9" y="23" width="2" height="2"/><rect x="21" y="23" width="2" height="2"/><rect x="9" y="18" width="2" height="2"/><rect x="21" y="18" width="2" height="2"/><rect x="9" y="13" width="2" height="2"/><rect x="15" y="23" width="2" height="2"/><rect x="15" y="18" width="2" height="2"/><rect x="15" y="13" width="2" height="2"/><rect x="21" y="13" width="2" height="2"/><rect x="9" y="7" width="14" height="3"/></svg>