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/voice-mode.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <path d="M17,29h-2V3h2v26ZM23,6h-2v20h2V6ZM11,6h-2v20h2V6ZM5,11h-2v10h2v-10ZM29,11h-2v10h2.0031s-.0031-10-.0031-10Z"/> </svg>