chore: initial scaffold of KDC Design System

Initial repository scaffold:
- design.md (google-labs-code/design.md format) as canonical token + guidelines source
- brand assets, foundations, tokens (W3C-style JSON)
- 12 component primitives, each with labeled anatomy.svg and spec README
- light / dark / high-contrast themes, web/mobile/email/print/presentation templates
- docs (getting started, principles, a11y, voice & tone, contributing)
- runnable web example, token build script stub, CI placeholder

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

brand/README.md

@@ -0,0 +1,16 @@
+# Brand
+
+Logo lockups, wordmarks, and brand guidelines.
+
+| Path | Purpose |
+|------|---------|
+| `logos/primary/`   | Primary KDC mark — full color, on-light, on-dark variants. |
+| `logos/secondary/` | Stacked / vertical lockups for square placements. |
+| `logos/monochrome/`| Single-color black and white marks for print and embossing. |
+| `logos/favicon/`   | Browser, PWA, and OS icons. |
+| `wordmarks/`       | Typography-only KDC wordmark. |
+| `icon-set/`        | Small standalone brand glyphs. |
+| `logos-source/`    | Editable Adobe Illustrator / Figma / Sketch sources. |
+| `brand-guidelines/`| Voice, photography, illustration style, do/don'ts. |
+
+All logos in this folder are placeholders — replace with the official artwork before any production use.