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/battery-quarter.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"><title>battery--quarter</title><path class="cls-1" d="M24,24H6a2.0023,2.0023,0,0,1-2-2V10A2.002,2.002,0,0,1,6,8H24a2.0023,2.0023,0,0,1,2,2v1h1a2.0023,2.0023,0,0,1,2,2v6a2.0027,2.0027,0,0,1-2,2H26v1A2.0027,2.0027,0,0,1,24,24ZM6,10V22H24V19h3V13H24V10Z"/><rect class="cls-1" x="6" y="14" width="8" height="4" transform="translate(26 6) rotate(90)"/></svg>