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/ibm--ix.svg

@@ -0,0 +1,16 @@
+<?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="ibm--ix_1_" d="M25.5,25.86c-0.092,0-0.185-0.035-0.255-0.105l-4.495-4.496l-4.496,4.496c-0.141,0.141-0.368,0.141-0.509,0
+	l-4.496-4.496l-4.496,4.496c-0.141,0.141-0.368,0.141-0.509,0l-4.75-4.75c-0.141-0.141-0.141-0.369,0-0.51L5.991,16l-4.495-4.496
+	c-0.141-0.141-0.141-0.368,0-0.509l4.75-4.75c0.141-0.141,0.368-0.141,0.509,0l4.496,4.495l4.496-4.495
+	c0.141-0.141,0.368-0.141,0.509,0l4.496,4.495l4.495-4.495c0.141-0.141,0.369-0.141,0.51,0l4.75,4.75
+	c0.141,0.141,0.141,0.368,0,0.509L26.009,16l4.496,4.495c0.141,0.141,0.141,0.369,0,0.51l-4.75,4.75
+	C25.685,25.825,25.592,25.86,25.5,25.86z M20.75,20.39c0.092,0,0.185,0.035,0.255,0.105l4.495,4.496l4.241-4.241l-4.496-4.496
+	c-0.141-0.141-0.141-0.368,0-0.509l4.496-4.496L25.5,7.009l-4.495,4.495c-0.141,0.141-0.369,0.141-0.51,0L16,7.009l-4.241,4.241
+	l4.495,4.496c0.07,0.07,0.105,0.162,0.105,0.254c0,0.092-0.035,0.184-0.105,0.254l-4.495,4.496L16,24.991l4.495-4.496
+	C20.565,20.425,20.658,20.39,20.75,20.39z M2.259,20.75L6.5,24.991l4.241-4.241L6.5,16.509L2.259,20.75z M7.009,16l4.241,4.241
+	L15.491,16l-4.241-4.241L7.009,16z M2.259,11.25L6.5,15.491l4.241-4.241L6.5,7.009L2.259,11.25z"/>
+<rect id="_Transparent_Rectangle" style="fill:none;" width="32" height="32"/>
+</svg>