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/ibm-cloud-pak-security.svg

@@ -0,0 +1 @@
+<svg id="icon" width="32" height="32" viewBox="0 0 32 32"> <path d="M16,23.7285a6.0069,6.0069,0,0,1-6-6v-6.457l6-3,6,3v6.457A6.0069,6.0069,0,0,1,16,23.7285ZM12,12.5073v5.2212a4,4,0,0,0,8,0V12.5073l-4-2Z"/> <path d="M16,31a.9988.9988,0,0,1-.5039-.1357l-12-7A1.0008,1.0008,0,0,1,3,23V9a.9994.9994,0,0,1,.4961-.8638l12-7a1,1,0,0,1,1.0078,0l12,7L27.4961,9.8638,16,3.1577,5,9.5742V22.4258l11,6.417,11-6.417V15h2v8a1.0008,1.0008,0,0,1-.4961.8643l-12,7A.9988.9988,0,0,1,16,31Z"/> </svg>