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/airline-digital-gate.svg

@@ -0,0 +1 @@
+<svg id="Layer_1" data-name="Layer 1" width="32" height="32" viewBox="0 0 32 32"> <path d="M18,23H16V21a3.0033,3.0033,0,0,0-3-3H9a3.0033,3.0033,0,0,0-3,3v2H4V21a5.0058,5.0058,0,0,1,5-5h4a5.0059,5.0059,0,0,1,5,5Z" transform="translate(0 0)"/> <path d="M11,6A3,3,0,1,1,8,9a3,3,0,0,1,3-3m0-2a5,5,0,1,0,5,5A5,5,0,0,0,11,4Z" transform="translate(0 0)"/> <rect x="2" y="26.0001" width="28" height="2"/> <path d="M31.9658,11.7413a1.0007,1.0007,0,0,0-1.2246-.707l-3.0861.826L24,7l-1,.2676,1.4584,5.4483-2.7663.7405L20,11.2066l-1,.2676.9337,3.4883a.9993.9993,0,0,0,1.2246.707l10.1005-2.7036A1,1,0,0,0,31.9658,11.7413Z" transform="translate(0 0)"/> </svg>