added slate editor, fixes

app/server/graphql/schema.graphql

@@ -52,6 +52,18 @@ input PaginationFilterInput {
   size: Int
 }
 
+input BookCreateInput {
+  title: String!
+  description: String!
+}
+
+input BookChapterCreateInput {
+  title: String!
+  content: String!
+  foreword: String
+  footnote: String
+}
+
 input BookManyInput {
   filter: PaginationFilterInput!
 }
@@ -88,6 +100,7 @@ type BookChapter {
   updatedAt: String!
   foreword: String!
   footnote: String!
+  sequenceNumber: Int!
   reviewsTotal: Int!
 }