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/electric.svg

@@ -0,0 +1,12 @@
+<?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="electric_1_" d="M25,8.64c-3.507,0-6.36,2.853-6.36,6.36v10c0,3.11-2.53,5.64-5.64,5.64S7.36,28.11,7.36,25v-5.658
+	c3.339-0.188,6-2.957,6-6.342V5c0-0.199-0.161-0.36-0.36-0.36h-2.64V1c0-0.199-0.161-0.36-0.36-0.36S9.64,0.801,9.64,1v3.64H4.36V1
+	c0-0.199-0.161-0.36-0.36-0.36S3.64,0.801,3.64,1v3.64H1C0.801,4.64,0.64,4.801,0.64,5v8c0,3.385,2.661,6.154,6,6.342V25
+	c0,3.507,2.853,6.36,6.36,6.36s6.36-2.854,6.36-6.36V15c0-3.11,2.529-5.64,5.64-5.64s5.64,2.53,5.64,5.64v10h0.721V15
+	C31.36,11.493,28.507,8.64,25,8.64z M1.36,5.36h11.28v3.28H1.36V5.36z M1.36,13V9.36h11.28V13c0,3.11-2.53,5.64-5.64,5.64
+	S1.36,16.11,1.36,13z"/>
+<rect id="_Transparent_Rectangle" style="fill:none;" width="32" height="32"/>
+</svg>