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/watson-machine-learning.svg

@@ -0,0 +1 @@
+<svg id="icon" viewBox="0 0 32 32"><title>watson--machine-learning</title><path d="M22,26H20V17.76l-3.23,3.88a1,1,0,0,1-1.54,0L12,17.76V26H10V15a1,1,0,0,1,.66-.94,1,1,0,0,1,1.11.3L16,19.44l4.23-5.08a1,1,0,0,1,1.11-.3A1,1,0,0,1,22,15Z" transform="translate(0)"/><path d="M4.16,14.65l-3-1.75a.76.76,0,1,0-.76,1.32L3.4,16a.76.76,0,1,0,.76-1.31Z" transform="translate(0)"/><path d="M8.29,10.52a.73.73,0,0,0,1,.27.75.75,0,0,0,.28-1l-1.74-3a.76.76,0,1,0-1.32.76Z" transform="translate(0)"/><path d="M16,9a.76.76,0,0,0,.76-.76V4.76a.76.76,0,1,0-1.52,0V8.25A.76.76,0,0,0,16,9Z" transform="translate(0)"/><path d="M22.68,10.79a.75.75,0,0,0,.37.11.76.76,0,0,0,.66-.38l1.75-3a.76.76,0,0,0-1.32-.76l-1.74,3A.75.75,0,0,0,22.68,10.79Z" transform="translate(0)"/><path d="M31.9,13.18a.76.76,0,0,0-1-.28l-3,1.75A.76.76,0,0,0,28.6,16l3-1.74A.77.77,0,0,0,31.9,13.18Z" transform="translate(0)"/></svg>