Allow org members to join existing org projects

[hahn-kev]

Describe the feature
An org member sees a project they would like to join, they click the project and there's a join button in place of the Get project button, this will send off an email to let the user request to join that project (can reuse the request used from the create project page)

Who is this feature for?
Org members

Pages affected
Project, maybe org page.