Adds API reference links

docs/source/code-generation/codegen-configuration.mdx

@@ -393,6 +393,8 @@ Specify the directory for your test mocks using the `path` parameter. This is re
 
 ## Output options
 
+**[`options: ApolloCodegenConfiguration.OutputOptions`](https://www.apollographql.com/docs/ios/docc/documentation/apollocodegenlib/apollocodegenconfiguration/outputoptions)**
+
 The code generation engine supports a number of configuration options to change the behaviour of the generator and tailor the generated Swift code to your specific needs.
 
 The top-level properties are:
@@ -599,6 +601,8 @@ let configuration = ApolloCodegenConfiguration(
 
 ## Experimental features
 
+**[`experimentalFeatures: ApolloCodegenConfiguration.ExperimentalFeatures`](https://www.apollographql.com/docs/ios/docc/documentation/apollocodegenlib/apollocodegenconfiguration/experimentalfeatures-swift.struct)**
+
 The code generation engine supports some behaviors where the affect on the generated code is considered experimental. An example of this is a specification of the GraphQL schema that is not yet formalized and undergoing change as the proposal advances.
 
 > Note: These features could change at any time and are not guaranteed to always be available.
@@ -635,6 +639,8 @@ let configuration = ApolloCodegenConfiguration(
 
 ## Schema download configuration
 
+**[`schemaDownload: ApolloSchemaDownloadConfiguration`](https://www.apollographql.com/docs/ios/docc/documentation/apollocodegenlib/apolloschemadownloadconfiguration)**
+
 An optional step in the code generation process is to fetch a GraphQL schema from a remote server. This step ensures that you always have an up-to-date schema on which to base your operations and it eliminates the need to manually download the schema outside of the automated process.
 
 The properties to configure the schema download are:
@@ -756,6 +762,8 @@ For more details, see the section on [downloading a schema](./downloading-schema
 
 ## Operation Manifest Configuration
 
+**[`operationManifest: ApolloCodegenConfiguration.OperationManifestConfiguration`](https://www.apollographql.com/docs/ios/docc/documentation/apollocodegenlib/apollocodegenconfiguration/operationmanifestconfiguration)**
+
 Optional settings used to configure generation of the operation identifier manifest for use with [Persisted Queries](./../fetching/persisted-queries).
 
 | Property Name | Description |