Create CRUD functions for each interface

[DylanTom]

For each interface, create CRUD functions in firebase/. For each interface, create a file called {interface}.ts

There should be a minimum of these functions for each interface:

• Create - create an entry into firebase
• Read - fetch an entry from firebase (based on a query that makes sense, perhaps a lambda function so that we can query whatever we want? This is up to discretion)
• Update - if it exists, update the entry (like editing a profilel)
• Delete - remove the entry from firebase

Make sure type and schema is imported so that future developers are forced to follow the schema.