Complete function list() in services/workshops.py

[XimenaColopy]

Fill out this function so it returns all of the workshops. This will allow the api to work
Just get the APIs working

[Littlesk]

What?
Create a function that calls the workshops API and returns an observable list of
Why?
This allows the front end to display the workshops in our database as fetched by the api.
Acceptance Criteria:

• function correctly returns the list within the database.

Optional Dev Notes:
list() was changed to getWorkshop() to be a more descriptive name.