- Updated Docker configuration to support PostgreSQL as an alternative to SQLite.
- Enhanced DockerEntrypoint.sh to create a database environment file and test PostgreSQL connection.
- Introduced database setup functions in install.sh for PostgreSQL installation and configuration.
- Added database management options in x-ui.sh, including backup and switching between SQLite and PostgreSQL.
- Implemented database configuration retrieval in the web service and controller layers.
- Updated frontend settings to include database configuration options.
- Added translations for new database settings in multiple languages.
