Extensible "Create Project" project type list

I have a request similar to #713, but more generic: that the Create Project list of project types could be extensible - and other extensions could contribute to it. Adding explicitly project types with their extension IDs and commands centrally into vscode-java-dependency does not scale well, as many extensions that support a certain technology could offer preconfigured java project templates, or "wizards" to create boilerplate projects.
In the long run, opening integration in the Create Java Project can offer a smooth user experience.

The same data as with the current hardcoded list could be contributed through package.json by other extensions: extension ID, label and command ID, and the Java Dependency extension would then define argument(s) that will be passed to the creation command (if any).

Comienza localizando la lista de tipos de Create Java Project codificada actualmente y revisando cómo package.json contribuye a los metadatos de las extensiones. Define los datos de contribución para el ID de la extensión, la etiqueta, el ID del comando y los argumentos opcionales; después, verifica que otra extensión pueda proporcionar un tipo de proyecto y que la lista Create Project lo invoque correctamente.