feat: add Adding a mutation to our schema

graphql/odyssey-lift-off/server/src/schema.js

@@ -10,6 +10,10 @@ const typeDefs = gql`
     module(id: ID!): Module!
   }
 
+  type Mutation {
+    incrementTrackViews(id: ID!): IncrementTrackViewsResponse!
+  }
+
   "A track is a group of Modules that teaches about a specific topic"
   type Track {
     id: ID!
@@ -52,6 +56,17 @@ const typeDefs = gql`
     "The module's video url, for video-based modules"
     videoUrl: String
   }
+
+  type IncrementTrackViewsResponse {
+    "Similar to HTTP status code, represents the status of the mutation"
+    code: Int!
+    "Indicates whether the mutation was successful"
+    success: Boolean!
+    "Human-readable message for the UI"
+    message: String!
+    "Newly updated track after a successful mutation"
+    track: Track
+  }
 `;
 
 module.exports = typeDefs;