docs: Add English README for MariaDB app (#2645)

mariadb/README_en.md

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+# MariaDB
+
+MariaDB is a popular open-source relational database management system (RDBMS), a fork of MySQL, offering robust features and performance suitable for a wide range of applications.
+
+## Core Features
+
+- **SQL Support**: Fully supports SQL (Structured Query Language), enabling users to perform various database operations, including queries, inserts, updates, and deletes.
+- **High Performance**: Delivers excellent performance through optimized query execution plans, indexing, caching, and multi-threaded processing.
+- **Cross-Platform**: Compatible with various operating systems, including Linux, Windows, and macOS.
+- **Transaction Support**: Provides ACID (Atomicity, Consistency, Isolation, Durability) compliant transaction handling to ensure data integrity and reliability.
+- **Replication and High Availability**: Offers data replication, master-slave replication, and clustering to ensure high availability and redundancy.
+
+## Security
+
+- **Access Control**: Role-based access control limits user permissions to safeguard database access.
+- **Data Encryption**: Supports encryption for data in transit and at rest to protect sensitive information from unauthorized access.
+- **Authentication**: Compatible with multiple authentication methods, including username/password and SSL certificates.
+
+## Data Types
+
+- **Standard Data Types**: Includes integers, floating points, date/time, and strings.
+- **Geospatial Data**: GIS functionality supports the storage and processing of geospatial data.
+
+## Storage Engines
+
+- **InnoDB**: The default storage engine, supporting transactions and foreign keys, ideal for most applications.
+- **MyISAM**: Provides full-text search and high-performance inserts for specific use cases.
+- **Additional Engines**: Supports other engines like Aria and TokuDB to meet diverse requirements.
+
+## Scalability
+
+- **Stored Procedures and Triggers**: Allows custom business logic implementation via stored procedures and triggers.
+- **Plugin Support**: Extensible through a plugin system to enhance MariaDB functionality.
+
+## Community Support
+
+- **Active Community**: A vibrant open-source community offers documentation, forums, and support for troubleshooting.
+- **Open Source**: Freely available for use, modification, and distribution, fostering innovation and flexibility.