More than one developer may work for the same project, how to integrate their work without any loss ?
You mean, one workflow will be developed by many developers? Or each developer will develop individual workflows?
For both , the difference will be project.json.
If they work on a single workflow, then use SVN available as pluggins now in the studio directly so that it will maintain the versions of each change
If they work on individual workflows and with different packages, while integrating all those, in the main workflow, we need to install all the dependencies @Mathi_P