Add function to get a users starred projects

[JulesRenz]

Description

Today, gitbeaker already has the ability to get a users projects via Gitlab.Users.projects(). This calls the GitLab API endpoint at /users/:user_id/projects, see here

What I miss is the functionality to also get the starred projects of a user, that is expose very similarly by the GitLab API /users/:user_id/starred_projects, see here

Proposal

I propose to implement this as a function Gitlab.Users.starredProjects() very similarly as it is done in Gitlab.Users.projects() but calling the appropriate endpoint /users/:user_id/starred_project instead.
Also, I'm willing to contribute this if you agree, that this is a feature, that should be in gitbeaker

Checklist

• I have checked that this is not a duplicate issue.
• I have read the documentation.

[jdalrymple]

🚀 Issue was released in 37.0.0 🚀