Add DbtProject in relevant APIs (reference)

docs/content/integrations/dbt/reference.mdx

@@ -24,6 +24,7 @@ For a step-by-step implementation walkthrough, refer to the [Using dbt with Dags
 | <PyObject module="dagster_dbt" object="dbt_assets" decorator />                                | A decorator used to define Dagster assets for dbt models defined in a dbt manifest.                                                                                                                                     |
 | <PyObject module="dagster_dbt" object="DbtCliResource" />                                      | A class that defines a Dagster resource used to execute dbt CLI commands.                                                                                                                                               |
 | <PyObject module="dagster_dbt" object="DbtCliInvocation" />                                    | A class that defines the representation of an invoked dbt command.                                                                                                                                                      |
+| <PyObject module="dagster_dbt" object="DbtProject" />                                          | A class that defines the representation of a dbt project and related settings that assist with managing manifest.json preparation.                                                                                      |
 | <PyObject module="dagster_dbt" object="DagsterDbtTranslator" />                                | A class that can be overridden to customize how Dagster asset metadata is derived from a dbt manifest.                                                                                                                  |
 | <PyObject module="dagster_dbt" object="DagsterDbtTranslatorSettings" />                        | A class with settings to enable Dagster features for a dbt project.                                                                                                                                                     |
 | <PyObject module="dagster_dbt" object="DbtManifestAssetSelection" />                           | A class that defines a selection of assets from a dbt manifest and a dbt selection string.                                                                                                                              |