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/service-desk.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"><title>service-desk</title><path d="M28,24V22A12.01,12.01,0,0,0,17,10.0507V8h3V6H12V8h3v2.0507A12.01,12.01,0,0,0,4,22v2H2v2H30V24ZM16,12a10.0167,10.0167,0,0,1,9.7984,8H6.2015A10.0165,10.0165,0,0,1,16,12ZM6,22H26v2H6Z" transform="translate(0 0.0049)"/></svg>