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/concept.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"><title>concept</title><path d="M20.8851,19.4711a5.9609,5.9609,0,0,0,0-6.9422L23,10.4141l1.293,1.2929a.9995.9995,0,0,0,1.414,0l4-4a.9994.9994,0,0,0,0-1.414l-4-4a.9994.9994,0,0,0-1.414,0l-4,4a.9994.9994,0,0,0,0,1.414L21.5859,9l-2.1148,2.1149a5.9609,5.9609,0,0,0-6.9422,0L10,8.5859V2H2v8H8.5859l2.529,2.5289a5.9609,5.9609,0,0,0,0,6.9422L9,21.5859,7.707,20.293a.9994.9994,0,0,0-1.414,0l-4,4a.9994.9994,0,0,0,0,1.414l4,4a.9995.9995,0,0,0,1.414,0l4-4a.9994.9994,0,0,0,0-1.414L10.4141,23l2.1148-2.1149a5.9609,5.9609,0,0,0,6.9422,0L22,23.4141V30h8V22H23.4141ZM25,4.4141,27.5859,7,25,9.5859,22.4141,7ZM7,27.5859,4.4141,25,7,22.4141,9.5859,25ZM8,8H4V4H8Zm4,8a4,4,0,1,1,4,4A4.0045,4.0045,0,0,1,12,16Zm12,8h4v4H24Z"/></svg>