feat: complete tOS project with HR, LEAN, Dashboard and Integrations modules

Full enterprise web operating system including:
- Next.js 14 frontend with App Router, i18n (DE/EN), shadcn/ui
- NestJS 10 backend with Prisma, JWT auth, Swagger docs
- Keycloak 24 SSO with role-based access control
- HR module (employees, time tracking, absences, org chart)
- LEAN module (3S planning, morning meeting SQCDM, skill matrix)
- Integrations module (PlentyONE, Zulip, Todoist, FreeScout, Nextcloud, ecoDMS, GembaDocs)
- Dashboard with customizable drag & drop widget grid
- Docker Compose infrastructure (PostgreSQL 16, Redis 7, Keycloak 24)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/shared/package.json

@@ -0,0 +1,36 @@
+{
+  "name": "@tos/shared",
+  "version": "0.1.0",
+  "private": true,
+  "description": "Shared types, utilities, and constants for tOS",
+  "main": "./dist/index.js",
+  "module": "./dist/index.mjs",
+  "types": "./dist/index.d.ts",
+  "exports": {
+    ".": {
+      "import": "./dist/index.mjs",
+      "require": "./dist/index.js",
+      "types": "./dist/index.d.ts"
+    },
+    "./types": {
+      "import": "./dist/types/index.mjs",
+      "require": "./dist/types/index.js",
+      "types": "./dist/types/index.d.ts"
+    },
+    "./utils": {
+      "import": "./dist/utils/index.mjs",
+      "require": "./dist/utils/index.js",
+      "types": "./dist/utils/index.d.ts"
+    }
+  },
+  "scripts": {
+    "build": "tsup",
+    "dev": "tsup --watch",
+    "typecheck": "tsc --noEmit",
+    "clean": "rm -rf dist .turbo"
+  },
+  "devDependencies": {
+    "tsup": "^8.0.0",
+    "typescript": "^5.3.0"
+  }
+}