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/plan.svg

@@ -0,0 +1,7 @@
+<!-- Generator: Adobe Illustrator 26.5.0, 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="M31,8c0-0.4-0.2-0.7-0.5-0.9l-7-4C23.3,3,23.2,3,23,3s-0.3,0-0.5,0.1L16,6.8L9.5,3.1C9.3,3,9.2,3,9,3S8.7,3,8.5,3.1l-7,4 C1.2,7.3,1,7.6,1,8v20c0,0.6,0.4,1,1,1c0.2,0,0.3-0.1,0.5-0.1l0,0L9,25.2l6.5,3.7C15.7,29,15.8,29,16,29s0.3,0,0.5-0.1l6.5-3.7 l6.5,3.7l0,0c0.1,0.1,0.3,0.1,0.5,0.1c0.6,0,1-0.4,1-1V8z M3,8.6l5-2.9v17.7l-5,2.9V8.6z M15,26.3l-5-2.9V5.7l5,2.9V26.3z M22,23.4 l-5,2.9V8.6l5-2.9V23.4z M24,23.4V5.7l5,2.9l0,17.7L24,23.4z"/>
+<rect id="_x3C_Transparent_Rectangle_x3E__363_" class="st0" width="32" height="32"/>
+</svg>