chore: document connection pool repository

src/DatabaseConfiguration.php

src/DatabaseConnection.php

src/DatabaseConnectionPoolConfiguration.php

src/DatabaseConnectionPoolRepository.php

src/DatabaseQuery.php

src/EventListener/SQLQueryLogger.php

src/SingletonProvider/ConfigurationProvider.php

...r/ConfigurationProvider/DatabaseConfigurationProvider.php

...ider/ConfigurationProvider/RedisConfigurationProvider.php

...ConfigurationProvider/StaticPageConfigurationProvider.php

...der/ConfigurationProvider/SwooleConfigurationProvider.php

...ConfigurationProvider/TranslatorConfigurationProvider.php

...etonProvider/DatabaseConnectionPoolRepositoryProvider.php

src/SingletonProvider/SwoolePDOConfigProvider.php

src/SingletonProvider/SwoolePDOPoolProvider.php