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/session-border-control.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <path d="M26,8,24.59,9.41,27.17,12H16a5.967,5.967,0,0,0-4,1.54V6.83l2.59,2.58L16,8,11,3,6,8,7.41,9.41,10,6.83V18a5.969,5.969,0,0,0,1.54,4H4.83l2.58-2.59L6,18,1,23l5,5,1.41-1.41L4.83,24H16A5.99,5.99,0,0,0,20.46,14h6.71l-2.58,2.59L26,18l5-5ZM20,18a4,4,0,1,1-4-4A4.0045,4.0045,0,0,1,20,18Z"/> </svg>