[Enhancement]: setCommand should allow space escaping

[ylemoigne]

Module

Core

Proposal

Currently, GenericContainer.setCommand(String) do a command.split(" ").
This doesn't allow escaping the space. It can be an issue for command lines like postgres -c max_connections=100 -c default_transaction_isolation=repeatable read

The alternative method setCommand(String... commandParts) is not always available, for example, when using testcontainers through quarkus dev-service which doesn't expose a way to set command through array/list of parameters.

As command.split() take a regexp, changing the implementation to command.split("[^\\]? ") should allow user to write postgres -c max_connections=100 -c default_transaction_isolation=repeatable\ read and get correct interpretation.