Fixes and improvements

[rw4lll]

This pull request introduces several significant changes to the Testcontainers library, focusing on improving container management, adding new exceptions, and enhancing port handling. Below are the most important changes, grouped by theme:

Container Management Enhancements:

• src/Container/GenericContainer.php: Refactored the start method to include retry logic and image pulling, added createContainerConfig and createHostConfig methods for better configuration handling.
• src/Container/GenericContainer.php: Introduced PortGenerator with RandomUniquePortGenerator as the default, and added withPortGenerator method. [1] [2]
• src/Container/GenericContainer.php: Updated withHealthCheckCommand to use more detailed health check configurations.

Port Handling Improvements:

• src/Container/Container.php: Added FixedPortGenerator for fixed port assignments.
• src/Container/GenericContainer.php: Replaced inline port normalization with PortNormalizer::normalizePort.
• src/Container/InternetProtocol.php: Introduced InternetProtocol enum for better IP protocol handling.

New Exception Classes:

• src/Exception/ContainerException.php: Added base ContainerException class.
• src/Exception/ContainerStateException.php: Introduced ContainerStateException for container state retrieval issues.
• src/Exception/HealthCheckFailedException.php: Added HealthCheckFailedException for health check failures.
• src/Exception/HealthCheckNotConfiguredException.php: Added HealthCheckNotConfiguredException for unconfigured health checks.

Specific Container Updates:

• src/Container/MariaDBContainer.php, src/Container/MySQLContainer.php, src/Container/OpenSearchContainer.php, src/Container/PostgresContainer.php, src/Container/RedisContainer.php: Updated constructors to use FixedPortGenerator for specific ports. [1] [2] [3] [4] [5]

These changes collectively improve the robustness, configurability, and error handling of the Testcontainers library.