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/continuous-integration.svg

@@ -0,0 +1,7 @@
+<!-- Generator: Adobe Illustrator 26.3.1, 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 d="M31.9,15.5l-5.7-10C25.9,5.2,25.6,5,25.3,5H6.7C6.4,5,6.1,5.2,5.9,5.5l-5.7,10C0,15.7,0,15.8,0,16s0,0.3,0.1,0.5l5.7,10 C6.1,26.8,6.4,27,6.7,27h18.5c0.4,0,0.7-0.2,0.9-0.5l5.7-10C32,16.3,32,16.2,32,16S32,15.7,31.9,15.5z M17.8,15h-8l4-7L17.8,15z M15.5,7h8l-4,7L15.5,7z M17.8,17l-4,7l-4-7H17.8z M19.5,18l4,7h-8L19.5,18z M21.2,17h8l-4,7L21.2,17z M21.2,15l4-7l4,7H21.2z M7.3,7H12l-4.6,8H2.7L7.3,7z M7.3,25l-4.6-8h4.7l4.6,8H7.3z"/>
+<rect id="_x3C_Transparent_Rectangle_x3E__589_" class="st0" width="32" height="32"/>
+</svg>