Tran/set up weekly challenges

[tnt07-t]

Title

Added weekly_challenge table and query by date

Overview

Added table weekly_challenge.py in data base and added query get_weekly_challenge_by_date and added but commented out CreateWeeklyChallenge

Changes Made

I populated weekly_challenge table with name, message, start_date, and end_date, added serialize, and added query get_weekly_challenge_by_date

Test Coverage

Tested locally

[nfq2]

i left a couple of comments for small fixes. also, since ur changing the database and adding a new table you need to add a migration (tells our database what changes it needs to make). u can prob just ask chatgpt how to do this since i'm not 100% what the commands are but try:

generate migration file: alembic revision --autogenerate -m "add <table>"
syncs ur DB and apply changes to ur db: alembic upgrade head
push the new changes it added to ur branch as well (migrations/versions)

you might also wanna do some testing by creating new challenges and seeing if you can get them using ur endpoint

[cejiogu]

Note: Because we are using a GraphQL API, we don't need a serialize function, as the serialization is implemented on a field-level in the schema.py file