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/event-schedule.svg

@@ -0,0 +1 @@
+<svg id="icon" viewBox="0 0 32 32"><title>event-schedule</title><path d="M21,30a8,8,0,1,1,8-8A8,8,0,0,1,21,30Zm0-14a6,6,0,1,0,6,6A6,6,0,0,0,21,16Z"/><polygon points="22.59 25 20 22.41 20 18 22 18 22 21.59 24 23.59 22.59 25"/><path d="M28,6a2,2,0,0,0-2-2H22V2H20V4H12V2H10V4H6A2,2,0,0,0,4,6V26a2,2,0,0,0,2,2h4V26H6V6h4V8h2V6h8V8h2V6h4v6h2Z"/></svg>