refactor(server): reorganize server configs (#5753)

packages/backend/server/src/schema.gql

@@ -240,10 +240,18 @@ type ServerConfigType {
   """server identical name could be shown as badge on user interface"""
   name: String!
 
+  """server type"""
+  type: ServerDeploymentType!
+
   """server version"""
   version: String!
 }
 
+enum ServerDeploymentType {
+  Affine
+  Selfhosted
+}
+
 enum ServerFeature {
   Payment
 }