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/logo-discord.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="M25.7,7.1C23.9,6.3,22,5.7,20,5.3c0,0-0.1,0-0.1,0c-0.2,0.4-0.5,1-0.7,1.5c-2.2-0.3-4.3-0.3-6.4,0c-0.2-0.5-0.5-1-0.7-1.5 c0,0-0.1,0-0.1,0c-2,0.3-3.9,0.9-5.7,1.8c0,0,0,0,0,0c-3.6,5.4-4.6,10.7-4.1,15.9c0,0,0,0.1,0,0.1c2.4,1.8,4.7,2.8,7,3.5 c0,0,0.1,0,0.1,0c0.5-0.7,1-1.5,1.4-2.3c0,0,0-0.1,0-0.1c-0.8-0.3-1.5-0.6-2.2-1c-0.1,0-0.1-0.1,0-0.1c0.1-0.1,0.3-0.2,0.4-0.3 c0,0,0.1,0,0.1,0c4.6,2.1,9.5,2.1,14.1,0c0,0,0.1,0,0.1,0c0.1,0.1,0.3,0.2,0.4,0.3c0.1,0,0,0.1,0,0.1c-0.7,0.4-1.4,0.8-2.2,1 c0,0-0.1,0.1,0,0.1c0.4,0.8,0.9,1.6,1.4,2.3c0,0,0.1,0,0.1,0c2.3-0.7,4.6-1.8,7-3.5c0,0,0,0,0-0.1C30.5,17,28.9,11.8,25.7,7.1 C25.7,7.1,25.7,7.1,25.7,7.1z M11.4,19.9c-1.4,0-2.5-1.3-2.5-2.8s1.1-2.8,2.5-2.8c1.4,0,2.5,1.3,2.5,2.8 C13.9,18.6,12.8,19.9,11.4,19.9z M20.7,19.9c-1.4,0-2.5-1.3-2.5-2.8s1.1-2.8,2.5-2.8c1.4,0,2.5,1.3,2.5,2.8 C23.2,18.6,22.1,19.9,20.7,19.9z"/>
+<rect id="_x3C_Transparent_Rectangle_x3E__363_" class="st0" width="32" height="32"/>
+</svg>