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-z-os-package-manager.svg

@@ -0,0 +1,10 @@
+<!-- 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 d="M15,9v10.172l-2.586-2.586L11,18l5,5l5-5l-1.414-1.414L17,19.172V9H15z"/>
+<path d="M19.758,26.65L16,28.842L5,22.426V18H3v5c0,0.355,0.189,0.685,0.496,0.864l12,7C15.652,30.955,15.826,31,16,31 s0.348-0.045,0.504-0.136l4.282-2.498L19.758,26.65z"/>
+<path d="M28.504,8.136l-4.269-2.49l-1.029,1.715L27,9.574v12.852l-3.787,2.209l1.029,1.715l4.262-2.486 C28.811,23.685,29,23.355,29,23V9C29,8.645,28.811,8.315,28.504,8.136z"/>
+<path d="M5,9.574l11-6.417l3.751,2.188L20.78,3.63l-4.276-2.494C16.348,1.045,16.174,1,16,1s-0.348,0.045-0.504,0.136l-12,7 C3.189,8.315,3,8.645,3,9v5h2V9.574z"/>
+<rect id="_x3C_Transparent_Rectangle_x3E__589_" class="st0" width="32" height="32"/>
+</svg>