feat(i18n): add Lingui runtime and development tooling

- add SSR-safe I18nProvider, Translate, locale hooks, catalog activation, and typed runtime APIs

- add consumer-owned Lingui configuration helpers and a CLI for locale creation, extraction, compilation, and project discovery

- add catalog read/write services plus a Vite development API plugin scoped to each consuming application

- add the portal-based I18nDevtool, message editor, dark-theme tracking, and standalone Message Studio

- document the consumer workflow and cover runtime, configuration, catalog, CLI, and Devtool behavior with tests

packages/i18n/package.json

@@ -0,0 +1,44 @@
+{
+  "name": "@workspace/i18n",
+  "version": "0.0.0",
+  "type": "module",
+  "private": true,
+  "engines": {
+    "node": ">=22.19.0"
+  },
+  "bin": {
+    "workspace-i18n": "./src/cli/index.ts"
+  },
+  "scripts": {
+    "format": "prettier --write \"**/*.{css,json,ts,tsx}\"",
+    "test": "vitest run",
+    "typecheck": "tsc --noEmit"
+  },
+  "exports": {
+    ".": "./src/index.ts",
+    "./devtool": "./src/devtool/index.ts",
+    "./lingui-config": "./src/config/lingui-config.ts",
+    "./vite": "./src/vite.ts"
+  },
+  "dependencies": {
+    "@lingui/cli": "^6",
+    "@lingui/conf": "^6",
+    "@lingui/core": "^6",
+    "@lingui/react": "^6",
+    "@vitejs/plugin-react": "^6",
+    "cac": "^7.0.0",
+    "open": "^11.0.0",
+    "react": "^19.2.6",
+    "react-dom": "^19.2.6",
+    "vite": "^8"
+  },
+  "devDependencies": {
+    "@testing-library/react": "^16",
+    "@types/node": "^24",
+    "@types/react": "^19",
+    "@types/react-dom": "^19",
+    "jsdom": "^30",
+    "typescript": "~6",
+    "vitest": "^4"
+  }
+}