I have been a project manager for a long time now and I know for sure that there is no such thing as teamwork plan in project management.
What you probably mean is a combination of the following:
- Project resource plan: Who are the resources working on the project, what are their expertise, their availability, how long will they be required on the project, etc...
- Project communication plan: How will resources communicate with each other on the project, how will tasks be delegated to resources, and who do they report technically to?
- Project schedule plan: What are the tasks that each resource has to work on? How much time is allocated for each task?
- Conflict management plan: How are conflicts dealt with within the project team? Who resolves these conflicts? And how?