What command is used to create a new theme in the generator-liferay-theme package?

The command used to create a new theme in the generator-liferay-theme package is 'liferay-theme'. This command initializes the process for creating a new theme project, setting up the necessary files and configurations required for a Liferay theme, which includes structuring the project in a way that complies with Liferay's architecture.

Furthermore, 'liferay-theme' allows developers to leverage Liferay's capabilities effectively and provides a solid foundation for customizing the look and feel of Liferay portals. It streamlines the setup process and ensures best practices are followed from the start.

In contrast to the other choices, 'liferay-theme: layout', 'liferay-theme: import', and 'liferay-theme: themelet' pertain to specific operations that may be performed within an existing theme project. They don't initiate the creation of a new theme. Hence, choosing 'liferay-theme' is essential for anyone looking to start a theme project in Liferay.