feat: optional payment for server (#5055)

packages/backend/server/src/schema.gql

@@ -2,6 +2,14 @@
 # THIS FILE WAS AUTOMATICALLY GENERATED (DO NOT MODIFY)
 # ------------------------------------------------------
 
+type ServerConfigType {
+  """server version"""
+  version: String!
+
+  """server flavor"""
+  flavor: String!
+}
+
 type UserType {
   id: ID!
 
@@ -240,6 +248,9 @@ type DocHistoryType {
 }
 
 type Query {
+  """server config"""
+  serverConfig: ServerConfigType!
+
   """Get is owner of workspace"""
   isOwner(workspaceId: String!): Boolean!