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/ibm-cloud-security-compliance-center.svg

@@ -0,0 +1,8 @@
+<!-- Generator: Adobe Illustrator 25.4.1, SVG Export Plug-In . SVG Version: 6.00 Build 0) -->
+<svg version="1.1" id="icon" x="0px" y="0px" width="32px" height="32px" viewBox="0 0 32 32" style="enable-background:new 0 0 32 32;" xml:space="preserve">
+<style type="text/css"> .st0{fill:none;}
+</style>
+<path id="_x3C_Path_x3E__00000043425793413296290420000018093581292944339895_" d="M30,18v5.5c0,1.5-0.9,2.8-2.3,3.5L26,27.8 L24.3,27c-1.4-0.6-2.3-2-2.3-3.5V18H30 M32,16H20v7.5c0,2.2,1.3,4.3,3.4,5.3L26,30l2.6-1.2c2.1-1,3.4-3,3.4-5.3V16L32,16z"/>
+<path d="M16,25H7.5C3.4,25,0,21.6,0,17.5c0-3.7,2.7-6.7,6.2-7.4C7.1,5.4,11.2,2,16,2c5.5,0,10,4.5,10,10h-2c0-4.4-3.6-8-8-8 c-4.1,0-7.5,3.1-8,7.1L8,12L7.1,12C4.2,12.2,2,14.6,2,17.5c0,3,2.5,5.5,5.5,5.5H16V25z"/>
+<rect id="_x3C_Transparent_Rectangle_x3E__589_" class="st0" width="32" height="32"/>
+</svg>