Add apply snapshot mutation

client/src/graphql/gql/mutations/snapshots/applySnapshot.gql

@@ -0,0 +1,28 @@
+#import "gql/fragments/objectiveGroupParts.gql"
+#import "gql/fragments/objectiveParts.gql"
+#import "gql/fragments/contentBlockInterfaceParts.gql"
+#import "gql/fragments/contentBlockParts.gql"
+#import "gql/fragments/moduleParts.gql"
+#import "gql/fragments/chapterParts.gql"
+
+mutation ApplySnapshot($input: ApplySnapshotInput!) {
+  applySnapshot(input: $input) {
+    success
+    module {
+      ...ModuleParts
+      objectiveGroups {
+        ...ObjectiveGroupParts
+        objectives {
+          ...ObjectiveParts
+        }
+      }
+      chapters {
+        ...ChapterParts
+        contentBlocks {
+          ...ContentBlockInterfaceParts
+          ...ContentBlockParts
+        }
+      }
+    }
+  }
+}