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/building-insights-3.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"><title>building--insights-3</title><path d="M28,2H16a2.002,2.002,0,0,0-2,2V14H4a2.002,2.002,0,0,0-2,2V30H30V4A2.0023,2.0023,0,0,0,28,2ZM9,28V21h4v7Zm19,0H15V20a1,1,0,0,0-1-1H8a1,1,0,0,0-1,1v8H4V16H16V4H28Z"/><rect x="18" y="8" width="2" height="2"/><rect x="24" y="8" width="2" height="2"/><rect x="18" y="14" width="2" height="2"/><rect x="24" y="14" width="2" height="2"/><rect x="18" y="19.9996" width="2" height="2"/><rect x="24" y="19.9996" width="2" height="2"/><rect x="2" y="10.0002" width="5" height="1.9995"/><rect x="10" y="2" width="2" height="5"/><rect x="5.5001" y="3.9644" width="1.9998" height="5.0713" transform="translate(-2.6924 6.5) rotate(-45)"/></svg>