Initial commit: DigiServer v2 with Blueprint Architecture

Features implemented:
- Application factory pattern with environment-based config
- 7 modular blueprints (main, auth, admin, players, groups, content, api)
- Flask-Caching with Redis support for production
- Flask-Login authentication with bcrypt password hashing
- API endpoints with rate limiting and Bearer token auth
- Comprehensive error handling and logging
- CLI commands (init-db, create-admin, seed-db)

Blueprint Structure:
- main: Dashboard with caching, health check endpoint
- auth: Login, register, logout, password change
- admin: User management, system settings, theme, logo upload
- players: Full CRUD, fullscreen view, bulk operations, playlist management
- groups: Group management, player assignments, content management
- content: Upload with progress tracking, file management, preview/download
- api: RESTful endpoints with authentication, rate limiting, player feedback

Performance Optimizations:
- Dashboard caching (60s timeout)
- Playlist caching (5min timeout)
- Redis caching for production
- Memoized functions for expensive operations
- Cache clearing on data changes

Security Features:
- Bcrypt password hashing
- Flask-Login session management
- admin_required decorator for authorization
- Player authentication via auth codes
- API Bearer token authentication
- Rate limiting on API endpoints (60 req/min default)
- Input validation and sanitization

Documentation:
- README.md: Full project documentation with quick start
- PROGRESS.md: Detailed progress tracking and roadmap
- BLUEPRINT_GUIDE.md: Quick reference for blueprint architecture

Pending work:
- Models migration from v1 with database indexes
- Utils migration from v1 with type hints
- Templates migration with updated route references
- Docker multi-stage build configuration
- Unit tests for all blueprints

Ready for models and utils migration from digiserver v1

.gitignore

@@ -0,0 +1,54 @@
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+venv/
+env/
+ENV/
+.venv
+
+# Flask
+instance/
+.webassets-cache
+
+# IDEs
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# Environment
+.env
+.env.local
+
+# Database
+*.db
+*.sqlite
+*.sqlite3
+
+# Uploads
+app/static/uploads/*
+!app/static/uploads/.gitkeep
+app/static/resurse/*
+!app/static/resurse/.gitkeep
+
+# Logs
+*.log
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Testing
+.coverage
+htmlcov/
+.pytest_cache/
+.tox/
+
+# Build
+dist/
+build/
+*.egg-info/