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/motion.json

@@ -0,0 +1,17 @@
+{
+  "motion": {
+    "duration": {
+      "instant": "0ms",
+      "fast":    "120ms",
+      "base":    "200ms",
+      "slow":    "320ms",
+      "slower":  "480ms"
+    },
+    "easing": {
+      "standard": "cubic-bezier(0.2, 0, 0, 1)",
+      "enter":    "cubic-bezier(0, 0, 0.2, 1)",
+      "exit":     "cubic-bezier(0.4, 0, 1, 1)",
+      "emphasis": "cubic-bezier(0.2, 0, 0, 1.2)"
+    }
+  }
+}