Issue10 Created endpoints for VolunteerEntry

[charlesmoreno32]

Developer: Charles Moreno

Closes #10

Pull Request Summary

Created all the requested endpoints for VolunteerEntry.

Modifications

Added files and folders to implement VolunteerEntry endpoints.

Testing Considerations

Used Boomerang to test all endpoints and MongoDB Compass to see if the changes were what was expected.

Pull Request Checklist

• [X] Code is neat, readable, and works
• [X] Comments are appropriate
• [X] The commit messages follows our guidelines
• [X] The developer name is specified
• [X] The summary is completed
• [X] Assign reviewers

Screenshots/Screencast

Not applicable because it's just backend endpoints

[andrewtchan]

That works, thank you!