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-pictograms/back-up--and-restore.svg

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<!-- Generator: Adobe Illustrator 27.5.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+	 viewBox="0 0 32 32" style="enable-background:new 0 0 32 32;" xml:space="preserve">
+<path id="back-up--and-restore_00000004523372143239061990000007551220703277152681_" d="M31.36,16c0,8.47-6.891,15.36-15.36,15.36
+	S0.64,24.47,0.64,16c0-7.276,5.168-13.606,12.288-15.052l0.144,0.706C6.286,3.032,1.36,9.065,1.36,16
+	c0,8.072,6.567,14.64,14.64,14.64c8.072,0,14.64-6.567,14.64-14.64c0-6.935-4.925-12.968-11.711-14.346l0.143-0.706
+	C26.192,2.394,31.36,8.724,31.36,16z M11.254,18.745l-0.509,0.51L16,24.509l5.255-5.254l-0.51-0.51l-4.385,4.386V1h-0.72v22.131
+	L11.254,18.745z"/>
+<rect id="_Transparent_Rectangle" style="fill:none;" width="32" height="32"/>
+</svg>