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/angle.svg

@@ -0,0 +1 @@
+<svg id="icon" viewBox="0 0 32 32"><title>watson-health--angle</title><path d="M9,24a3.51,3.51,0,0,0-.88-1.86L17.65,5.56l-1.73-1L6.35,21.12A3.06,3.06,0,0,0,5.5,21a3.5,3.5,0,1,0,3.15,5H28V24ZM5.5,26A1.5,1.5,0,1,1,7,24.5,1.5,1.5,0,0,1,5.5,26Z" transform="translate(0 0)"/><path d="M22,21h2a13,13,0,0,0-5.42-10.56l-1.16,1.62A11,11,0,0,1,22,21Z" transform="translate(0 0)"/></svg>