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>

.gitignore

@@ -0,0 +1,61 @@
+# Dependencies
+node_modules/
+.pnpm-store/
+
+# Build outputs
+dist/
+.next/
+out/
+build/
+
+# Turbo
+.turbo/
+
+# Environment files
+.env
+.env.local
+.env.*.local
+!.env.example
+
+# IDE
+.idea/
+.vscode/
+*.swp
+*.swo
+.DS_Store
+
+# Backups
+apps/api/integrations.backup/
+
+# Testing
+coverage/
+.nyc_output/
+
+# Logs
+logs/
+*.log
+npm-debug.log*
+pnpm-debug.log*
+
+# Prisma
+apps/api/prisma/migrations/*
+!apps/api/prisma/migrations/.gitkeep
+
+# Docker volumes (local)
+docker/data/
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Temporary files
+tmp/
+temp/
+*.tmp
+*.temp
+
+# Secrets
+*.pem
+*.key
+credentials.json
+secrets.json