Add Submission to the GraphQL Schema

[theyokohamalife]

Problem

We need a place in the database to store data submitted by users. This data will likely contain incomplete and inaccurate information.

Success

There's a new Submission type that can be queried in GraphQL.

Implementation Details

• Create a new Type in schema.graphql called Submission.
• Create a new Input in schema.graphql for Submission.
• Update the Query Type to include submission and submissions.