chore: initial DSMMG v0.2 — refonte architecturale complète

Mise en place du Design System ManageMate Group v0.2 — refonte du
système de tokens (préfixe --mmg-color-*), 9 presets accent
user-themable validés WCAG AA, overlays Radix UI + Floating UI,
Storybook 8 + Vitest + axe-core en CI, doc Astro Starlight,
DESIGN.md (format google-labs-code) et exports tokens DTCG/CSS/
TS/Figma/Tailwind v3 et v4.

- 4 packages monorepo pnpm : @managemate/{tokens,css,react,icons}
- 62 composants React headless-first (Sheet, HoverCard, ContextMenu,
  Slider, ToggleGroup, AvatarGroup, UserCard, ProfileHeader,
  MetricCard, PricingCard, FeatureCard, Text/Display/Eyebrow/Lead…)
- Lint contraste WCAG : 37/37 paires AA, branché CI
- Toast pile Sonner-style avec ResizeObserver
- Theming user (9 presets) sans casser sémantique fixe
- Identité Synapse (rose #D12B6A) préservée

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

packages/tokens/package.json

@@ -0,0 +1,36 @@
+{
+  "name": "@managemate/tokens",
+  "version": "0.1.0",
+  "description": "DSMMG design tokens — DTCG source + Style Dictionary build (CSS, TS, Figma)",
+  "type": "module",
+  "license": "UNLICENSED",
+  "private": true,
+  "sideEffects": false,
+  "main": "./dist/tokens.cjs",
+  "module": "./dist/tokens.js",
+  "types": "./dist/tokens.d.ts",
+  "exports": {
+    ".": {
+      "types": "./dist/tokens.d.ts",
+      "import": "./dist/tokens.js",
+      "require": "./dist/tokens.cjs"
+    },
+    "./css": "./dist/tokens.css",
+    "./figma": "./dist/figma-tokens.json",
+    "./tailwind": "./dist/tailwind.config.json",
+    "./tailwind.css": "./dist/tailwind.css",
+    "./source": "./src/tokens.json",
+    "./package.json": "./package.json"
+  },
+  "files": [
+    "dist",
+    "src"
+  ],
+  "scripts": {
+    "build": "node build.mjs",
+    "watch": "node build.mjs --watch"
+  },
+  "devDependencies": {
+    "style-dictionary": "^4.3.3"
+  }
+}