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/vpn-policy.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <path d="M30,15A6,6,0,1,0,20,19.46V29l4-1.8838L28,29V19.46A5.98,5.98,0,0,0,30,15ZM26,25.8477l-2-.9415-2,.9415V20.65a5.8877,5.8877,0,0,0,4,0ZM24,19a4,4,0,1,1,4-4A4.0045,4.0045,0,0,1,24,19Z" transform="translate(0 0)"/> <path d="M14,2A6.0066,6.0066,0,0,0,8,8v6H6a2.0023,2.0023,0,0,0-2,2V28a2.0023,2.0023,0,0,0,2,2H17V28H6V16h9V14H10V8a4,4,0,0,1,7.92-.8008l1.96-.3984A6.0167,6.0167,0,0,0,14,2Z" transform="translate(0 0)"/> </svg>