text: Title: Support accessing the DMMF at runtime
  Body: ## Problem
  
  Using typescript, I some times have to map all the schema with the following code:
  
  ```
  async function generatePrismaVariablesDescriptions(): Promise<any> {
    const a = {};
    //return Prisma.dmmf.datamodel.models;
    Prisma.dmmf.datamodel.models.map((model) => {
      //a[model.name] = {};
      model.fields.map((b) => {
        a[b.name] = b.isList ? b.type.toString() + '[]' : b.type.toString();
      });
    });
    return a;
  }
  ```
  
  It is unfortunate that right now this method is not implemented.
  
  ## Suggested solution
  
  Add similar method to python library.
  