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/cics-sit.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <polygon points="23 22 30 27 23 32 23 22"/> <path d="M26,3H6c-1.6543,0-3,1.3457-3,3V26c0,1.6543,1.3457,3,3,3h11v-9h12V6c0-1.6543-1.3457-3-3-3ZM6,5H26c.5515,0,1,.4482,1,1v3H5v-3c0-.5518,.4485-1,1-1Zm9,6v7H5v-7H15Zm0,16H6c-.5515,0-1-.4482-1-1v-6H15v7Zm2-9v-7h10v7h-10Z"/> </svg>