Add Protobuf with Testing + Codegen (#7)

Reviewed-on: #7
Reviewed-by: Ivan Malison <ivanmalison@gmail.com>
Co-authored-by: Mike Kalange <countablecloud@gmail.com>
Co-committed-by: Mike Kalange <countablecloud@gmail.com>

src/schema.gql

@@ -144,6 +144,7 @@ type ShotGQL {
   cueObjectFeatures: CueObjectFeaturesGQL
   pocketingIntentionFeatures: PocketingIntentionFeaturesGQL
   bankFeatures: BankFeaturesGQL
+  serializedShotPaths: SerializedShotPathsGQL
   user: UserGQL
 }
 
@@ -177,6 +178,10 @@ enum WallTypeEnum {
   SHORT
 }
 
+type SerializedShotPathsGQL {
+  b64EncodedBuffer: String
+}
+
 type UserGQL {
   id: Int!
   firebaseUid: String!