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/logo-slack.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"><title>logo--slack</title><path d="M9.0423,19.1661A2.5212,2.5212,0,1,1,6.5212,16.645H9.0423Z"/><path d="M10.3127,19.1661a2.5212,2.5212,0,0,1,5.0423,0v6.3127a2.5212,2.5212,0,1,1-5.0423,0Z"/><path d="M12.8339,9.0423A2.5212,2.5212,0,1,1,15.355,6.5212V9.0423Z"/><path d="M12.8339,10.3127a2.5212,2.5212,0,0,1,0,5.0423H6.5212a2.5212,2.5212,0,1,1,0-5.0423Z"/><path d="M22.9577,12.8339a2.5212,2.5212,0,1,1,2.5211,2.5211H22.9577Z"/><path d="M21.6873,12.8339a2.5212,2.5212,0,0,1-5.0423,0V6.5212a2.5212,2.5212,0,1,1,5.0423,0Z"/><path d="M19.1661,22.9577a2.5212,2.5212,0,1,1-2.5211,2.5211V22.9577Z"/><path d="M19.1661,21.6873a2.5212,2.5212,0,0,1,0-5.0423h6.3127a2.5212,2.5212,0,1,1,0,5.0423Z"/></svg>