Mysql addition

[Haris-Hambasic]

Summary

This pull request introduces support for pure MySQL connections alongside the existing Sequelize-based PostgreSQL support. The changes enhance the flexibility and scalability of the database layer, enabling developers to choose between using Sequelize or a native MySQL connection based on project requirements.
Changes Introduced

New Functionality:

1. Added connectDatabaseMySQL:

A function for establishing direct MySQL connections using the mysql2 library with support for SSL and optional logging.

2. Enhanced connectDatabaseSequelize:

Maintains robust PostgreSQL support via Sequelize, with improved defaults and error handling.

3. Unified Export:

Introduced DatabaseConnector: A unified object that consolidates both Sequelize and MySQL connection functions for seamless integration.

4. Error Handling:

Comprehensive error handling with descriptive messages for both MySQL and Sequelize connections to simplify debugging and ensure production readiness.

5. Default Parameters:

Default ports for PostgreSQL (5432) and MySQL (3306). Optional SSL support with proper configuration for MySQL connections.

Implementation Details

1. MySQL Connection (connectDatabaseMySQL)

Uses the mysql2/promise package to create a direct connection. Tests the connection with connection.ping() to ensure availability. Includes optional SSL support (sslEnabled flag) for secure connections. Allows logging of successful connections via an optional logging function.

2. Sequelize Connection (connectDatabaseSequelize)

Maintains existing Sequelize connection logic for PostgreSQL. Improved defaults for port, pool settings, and SSL. Ensures compatibility with existing Sequelize integrations.

3. Unified Export

Combines both connection methods under DatabaseConnector:
DatabaseConnector.sequelize(); // For Sequelize connections DatabaseConnector.mysql(); // For MySQL connections