addModelFactoryDeclaration receives DMMF.DataModel

[toyamarinyon]

addModelFactoryDeclaration receives three arguments: sourceFile: SourceFile, model: DMMF.Model, and models: DMMF.Model[]. sourceFile is the file where the factory is created, and DMMF.Model represents a single model that is the target for creating a factory, such as Post or User. When additional elements defined in the schema, such as enums, are needed, it is necessary to add arguments. Therefore, instead of Model[], the entire schema, represented by DMMF.DataModel, is added as an argument.