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/flag.svg

@@ -0,0 +1,10 @@
+<?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="flag_00000088095208933954020630000014517516617366894773_" d="M4.36,31H3.64V1c0-0.199,0.161-0.36,0.36-0.36h24
+	c0.131,0,0.251,0.071,0.314,0.186c0.063,0.114,0.061,0.254-0.009,0.365L23.425,9l4.881,7.809c0.069,0.111,0.072,0.25,0.009,0.366
+	C28.251,17.289,28.131,17.36,28,17.36H4.36V31z M4.36,16.64h22.991l-4.656-7.449c-0.072-0.117-0.072-0.265,0-0.382l4.656-7.449H4.36
+	V16.64z"/>
+<rect id="_Transparent_Rectangle" style="fill:none;" width="32" height="32"/>
+</svg>