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/user-x-ray.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"><title>user--x-ray</title><polygon class="cls-1" points="28 9 28 7 25 7 25 5 23 5 23 7 20 7 20 9 23 9 23 12 20 12 20 14 23 14 23 16 25 16 25 14 28 14 28 12 25 12 25 9 28 9"/><path d="M31,3H17a1,1,0,0,0-1,1V17a1,1,0,0,0,1,1H31a1,1,0,0,0,1-1V4A1,1,0,0,0,31,3ZM28,9H25v3h3v2H25v2H23V14H20V12h3V9H20V7h3V5h2V7h3Z" transform="translate(0 0)"/><path d="M15,30H13V26a2.9465,2.9465,0,0,0-3-3H6a2.9465,2.9465,0,0,0-3,3v4H1V26a4.9514,4.9514,0,0,1,5-5h4a4.9514,4.9514,0,0,1,5,5Z" transform="translate(0 0)"/><path d="M8,11a3,3,0,0,1,0,6,3,3,0,0,1,0-6M8,9A5,5,0,0,0,8,19,5,5,0,0,0,8,9Z" transform="translate(0 0)"/></svg>