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/flexibility.svg

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<!-- Generator: Adobe Illustrator 26.1.0, 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="flexibility_00000160183371685850511340000018182470296631530924_" d="M19.36,31h-0.72V16c0-1.301,1.059-2.36,2.36-2.36
+	h9.131l-2.386-2.386l0.51-0.509L31.509,14l-3.254,3.255l-0.51-0.509l2.386-2.386H21c-0.904,0-1.64,0.736-1.64,1.64V31z M16.36,31
+	h-0.72V1.869l-2.386,2.385l-0.509-0.509L16,0.491l3.255,3.255l-0.51,0.509L16.36,1.869V31z M13.36,31h-0.72V21
+	c0-0.904-0.736-1.64-1.64-1.64H1.869l2.385,2.385l-0.509,0.51L0.491,19l3.255-3.254l0.509,0.509L1.869,18.64H11
+	c1.301,0,2.36,1.059,2.36,2.36V31z"/>
+<rect id="_Transparent_Rectangle" style="fill:none;" width="32" height="32"/>
+</svg>