Show club revenue from membership fees for each semester

[evanugarte]

On the side navbar for the admin dashboard, add a new entry called "Club Earnings" with an icon for the dollar sign on the same row.

Clicking the button should open a modal, the modal should have content like

Total earnings from new members this semester: $<whatever>
Total new members this year: $<whatever>
Current active members: $<whatever>

game plan

• do the dessert problem, talk to evan about where this is
• create a new route in routes/User.js that accepts an HTTP GET request and figures out:

1. the number of users who have a verified email, a member role and signed up during this semester (disccuss what "this semester" means with evan)
2. the number of users who are the above criteria, with a membership expiration of this semester (this means they signed up for 1 semester)
3. the number of users who are the above criteria, with a membership expiration of next semester (this means they signed up for 2 semesters)

returns a json object like

{
    "newSingleSemesterMembers": 20,
    "newAnnualMembers": 15,
}

we can test the API with a simple HTTP GET request to verify the json object worked.

• add a new row to the admin dashboard navbar called "Club Earnings"

• clicking the button should show a modal. see the code for "reset password" as a good example

• when the modal is clicked, we should call our API to get the relevant information, and calculate the money ($20 a semester, $30 for a year)