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/react/package.json

@@ -0,0 +1,63 @@
+{
+  "name": "@managemate/react",
+  "version": "0.1.0",
+  "description": "DSMMG React components — headless-first, typed variants, tree-shakable",
+  "type": "module",
+  "license": "UNLICENSED",
+  "private": true,
+  "sideEffects": false,
+  "main": "./dist/index.cjs",
+  "module": "./dist/index.js",
+  "types": "./dist/index.d.ts",
+  "exports": {
+    ".": {
+      "types": "./dist/index.d.ts",
+      "import": "./dist/index.js",
+      "require": "./dist/index.cjs"
+    },
+    "./package.json": "./package.json"
+  },
+  "files": [
+    "dist",
+    "src",
+    "README.md"
+  ],
+  "scripts": {
+    "build": "tsup",
+    "dev": "tsup --watch",
+    "typecheck": "tsc --noEmit",
+    "test": "vitest run",
+    "test:watch": "vitest"
+  },
+  "peerDependencies": {
+    "react": ">=18",
+    "react-dom": ">=18"
+  },
+  "dependencies": {
+    "@floating-ui/react": "^0.27.0",
+    "@managemate/css": "workspace:*",
+    "@managemate/icons": "workspace:*",
+    "@radix-ui/react-context-menu": "^2.2.14",
+    "@radix-ui/react-dialog": "^1.1.13",
+    "@radix-ui/react-dropdown-menu": "^2.1.14",
+    "@radix-ui/react-hover-card": "^1.1.13",
+    "@radix-ui/react-popover": "^1.1.13",
+    "@radix-ui/react-slider": "^1.3.4",
+    "@radix-ui/react-toggle-group": "^1.1.9",
+    "@radix-ui/react-tooltip": "^1.2.6"
+  },
+  "devDependencies": {
+    "@testing-library/jest-dom": "^6.6.3",
+    "@testing-library/react": "^16.1.0",
+    "@testing-library/user-event": "^14.5.2",
+    "@types/react": "^19.2.14",
+    "@types/react-dom": "^19.2.3",
+    "@vitejs/plugin-react": "^4.3.4",
+    "axe-core": "^4.10.2",
+    "jsdom": "^25.0.1",
+    "tsup": "^8.5.0",
+    "typescript": "~5.7.0",
+    "vitest": "^2.1.9",
+    "vitest-axe": "^0.1.0"
+  }
+}