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/BPMN-link-fill.svg

@@ -0,0 +1,2 @@
+<svg id="Icon" width="32" height="32" version="1.1" viewBox="0 0 32 32"> <!-- Generator: Adobe Illustrator 30.1.0, SVG Export Plug-In . SVG Version: 2.1.1 Build 136) --> <path d="M29.7076,16.7064l-.0006.0006-12,12.0002c-.3906.3904-1.0237.3904-1.4142-.0002-.1874-.1875-.2927-.4417-.2928-.7068v-5.0001H6c-1.104-.0013-1.9987-.896-2-2v-10.0002c.0015-1.104.8961-1.9985,2-2h10V3.9998c0-.5523.4479-.9999,1.0002-.9998.2651,0,.5193.1053.7068.2928l12,12.0002c.3904.3901.3907,1.0229.0006,1.4134Z"/> <rect id="__x3C_Transparent_Rectangle_x3E_" class="st0" width="32" height="32"/>
+</svg>