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/music.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"><title>music</title><path d="M25,4H10A2.002,2.002,0,0,0,8,6V20.5563A3.9551,3.9551,0,0,0,6,20a4,4,0,1,0,4,4V12H25v8.5562A3.9545,3.9545,0,0,0,23,20a4,4,0,1,0,4,4V6A2.0023,2.0023,0,0,0,25,4ZM6,26a2,2,0,1,1,2-2A2.0023,2.0023,0,0,1,6,26Zm17,0a2,2,0,1,1,2-2A2.0027,2.0027,0,0,1,23,26ZM10,6H25v4H10Z"/></svg>