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/hills.svg

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<!-- Generator: Adobe Illustrator 24.1.2, 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="hills_1_" d="M30.192,29.64L16.36,8.891V5.36h4.509l-1.86-1.86l1.86-1.86H15.64v7.251L1.807,29.64H1v0.721h30V29.64H30.192
+	z M16.36,2.36h2.771l-1.14,1.14l1.14,1.14H16.36V2.36z M2.673,29.64L8,21.649l5.327,7.99L2.673,29.64L2.673,29.64z M14.193,29.64
+	L8.433,21L12,15.649l9.327,13.991H14.193z M22.192,29.64L12.433,15L16,9.649L29.327,29.64H22.192z"/>
+<rect id="_Transparent_Rectangle" style="fill:none;" width="32" height="32"/>
+</svg>