Add 1.4 migration documentation

docs/.vitepress/config.ts

@@ -70,6 +70,10 @@ export default defineConfig({
 						text: 'Migrate to v1.2',
 						link: '/migration/v1.2',
 					},
+					{
+						text: 'Migrate to v1.4',
+						link: '/migration/v1.4',
+					},
 				]
 			}
 		],

docs/migration/v1.4.md

@@ -0,0 +1,40 @@
+# Migrate to v1.4
+
+The update from version 1.3.z to 1.4.z is easy, there are no breaking changes in this update. The release focused on
+performance improvements, bug fixes and the addition of request models.
+
+## Request models
+
+The biggest change in version 1.4 is the addition of request models. Previously calling the API with large requests
+could be annoying because all parameters had to be added to the function call. Request models solve this problem
+replacing the parameters with a data class to hold all values instead.
+
+Here is an example for migrating a "getNextUp" API call from a parameter function to request model.
+
+### Parameter function
+
+```kotlin
+val nextUp by api.tvShowsApi.getNextUp(
+	userId = api.userId,
+	imageTypeLimit = 1,
+	limit = 10,
+	fields = listOf(ItemFields.DATE_CREATED),
+)
+```
+
+### Request model
+
+```kotlin
+val nextUpQuery = GetNextUpRequest(
+	userId = api.userId,
+	imageTypeLimit = 1,
+	limit = 10,
+	fields = listOf(ItemFields.DATE_CREATED),
+)
+
+val nextUp by api.tvShowsApi.getNextUp(nextUpQuery)
+```
+
+Request models are data classes, which means the `copy()` function can be used to change values. Request models are
+available for all API calls that use five or more parameters. The parameter functions are still available. Both options
+will be supported in future versions.