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/color--contrast.svg

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<!-- Generator: Adobe Illustrator 24.3.0, 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="color--contrast_1_" d="M16,31.36C7.53,31.36,0.64,24.47,0.64,16S7.53,0.64,16,0.64S31.36,7.53,31.36,16
+	S24.47,31.36,16,31.36z M16,1.36C7.927,1.36,1.36,7.927,1.36,16c0,8.072,6.567,14.64,14.64,14.64c0.673,0,1.336-0.045,1.985-0.134
+	l12.521-12.521c0.089-0.649,0.134-1.312,0.134-1.985c0-0.677-0.046-1.343-0.135-1.996l-14.25,14.25l-0.509-0.51l14.613-14.613
+	c-0.21-1.053-0.533-2.065-0.957-3.025L16.254,23.255l-0.509-0.51L29.074,9.417c-0.437-0.863-0.956-1.678-1.548-2.434L16.254,18.255
+	l-0.509-0.51l11.321-11.32c-0.616-0.71-1.3-1.362-2.039-1.943l-8.773,8.772l-0.509-0.509l8.699-8.699
+	C23.652,3.484,22.801,3,21.905,2.603l-5.651,5.65l-0.509-0.509l5.438-5.438c-1.009-0.383-2.071-0.658-3.172-0.81l-1.757,1.757
+	l-0.509-0.509L17.091,1.4C16.73,1.374,16.367,1.36,16,1.36z M30.281,19.228L19.228,30.281
+	C24.714,29.042,29.042,24.714,30.281,19.228z"/>
+<rect id="_Transparent_Rectangle" style="fill:none;" width="32" height="32"/>
+</svg>