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/pre-prod-environment.svg

@@ -0,0 +1,2 @@
+<svg id="Icon" width="32" height="32" version="1.1" viewBox="0 0 32 32"> <!-- Generator: Adobe Illustrator 30.2.1, SVG Export Plug-In . SVG Version: 2.1.1 Build 1) --> <path d="M4.0001,14.0001v4h-2v-4s2,0,2,0ZM30.0001,14.0001v4h-2v-4s2,0,2,0ZM4.0001,20.0001v4h-2v-4h2ZM6.0001,28.0001v2h-2c-1.1001,0-2-.9-2-2v-2h2v2h2ZM12.0001,28.0001v2h-4v-2h4ZM28,2H4c-1.1001,0-2,.9-2,2v8h2v-2h24v2h2V4c0-1.1-.8999-2-2-2ZM25.5802,22.4099l1.42-1.41,4,4-4,4-1.41-1.42,2.58-2.58-2.59-2.59ZM19.4202,27.5899l-1.42,1.41-4-4,4-4,1.41,1.42-2.58,2.58,2.59,2.59ZM24.9152,20.5769l-1.915-.577-2.915,9.423,1.915.577,2.915-9.423Z"/> <rect id="__x3C_Transparent_Rectangle_x3E_" class="st0" width="32" height="32"/>
+</svg>