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/icon-users.svg

@@ -0,0 +1,6 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="#6366f1" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+  <path d="M17 21v-2a4 4 0 0 0-4-4H5a4 4 0 0 0-4 4v2"/>
+  <circle cx="9" cy="7" r="4"/>
+  <path d="M23 21v-2a4 4 0 0 0-3-3.87"/>
+  <path d="M16 3.13a4 4 0 0 1 0 7.75"/>
+</svg>