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/microphone-filled.svg

@@ -0,0 +1 @@
+<svg id="icon" viewBox="0 0 32 32"><title>microphone--filled</title><path d="M23,14v3A7,7,0,0,1,9,17V14H7v3a9,9,0,0,0,8,8.94V28H11v2H21V28H17V25.94A9,9,0,0,0,25,17V14Z" transform="translate(0)"/><path d="M16,22a5,5,0,0,0,5-5V7A5,5,0,0,0,11,7V17A5,5,0,0,0,16,22Z" transform="translate(0)"/></svg>