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/help.svg

@@ -0,0 +1 @@
+<svg id="icon" viewBox="0 0 32 32"><title>help</title><path d="M16,2A14,14,0,1,0,30,16,14,14,0,0,0,16,2Zm0,26A12,12,0,1,1,28,16,12,12,0,0,1,16,28Z"/><circle cx="16" cy="23.5" r="1.5"/><path d="M17,8H15.5A4.49,4.49,0,0,0,11,12.5V13h2v-.5A2.5,2.5,0,0,1,15.5,10H17a2.5,2.5,0,0,1,0,5H15v4.5h2V17a4.5,4.5,0,0,0,0-9Z"/><rect class="cls-1" width="32" height="32"/></svg>