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/sun.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"><title>sunny</title><path d="M16,12a4,4,0,1,1-4,4,4.0045,4.0045,0,0,1,4-4m0-2a6,6,0,1,0,6,6,6,6,0,0,0-6-6Z" transform="translate(0 0.0049)"/><rect x="6.8536" y="5.3745" width="1.9998" height="4.958" transform="translate(-3.253 7.8584) rotate(-45)"/><rect x="2" y="15.0049" width="5" height="2"/><rect x="5.3745" y="23.1466" width="4.958" height="1.9998" transform="translate(-14.7739 12.6305) rotate(-45)"/><rect x="15" y="25.0049" width="2" height="5"/><rect x="23.1466" y="21.6675" width="1.9998" height="4.958" transform="translate(-10.0018 24.1514) rotate(-45)"/><rect x="25" y="15.0049" width="5" height="2"/><rect x="21.6675" y="6.8536" width="4.958" height="1.9998" transform="translate(1.5191 19.3793) rotate(-45)"/><rect x="15" y="2.0049" width="2" height="5"/></svg>