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>

tokens/README.md

@@ -0,0 +1,15 @@
+# Tokens
+
+Machine-readable design tokens, exported from the canonical [`../design.md`](../design.md) source. These files are the integration point for downstream platforms (web/CSS, iOS, Android, Figma).
+
+| File | Purpose |
+|------|---------|
+| `colors.json` | Brand, neutral, and semantic colors. |
+| `typography.json` | Type ramp (display → caption + mono). |
+| `spacing.json` | 4px base spacing scale. |
+| `radius.json` | Corner radius scale. |
+| `elevation.json` | Shadow / depth tokens. |
+| `motion.json` | Duration + easing tokens. |
+| `breakpoints.json` | Responsive breakpoints. |
+
+> Tokens conform broadly to the [W3C Design Tokens Format](https://design-tokens.github.io/community-group/format/). Run `npm run build:tokens` to regenerate platform outputs once `scripts/build-tokens.js` is implemented.