docs: document the existence of dependencyAnalysis.app().

Author: autonomousapps

src/main/kotlin/com/autonomousapps/DependencyAnalysisExtension.kt

@@ -16,6 +16,9 @@ import javax.inject.Inject
  * // settings.gradle[.kts], or
  * // root build.gradle[.kts]
  * dependencyAnalysis {
+ *   // Declare that this subproject is an "application"-type subproject.
+ *   app()
+ *
  *   // Declare that the plugin should use typesafe project accessors. False by default.
  *   useTypesafeProjectAccessors(true)
  *

src/main/kotlin/com/autonomousapps/DependencyAnalysisSubExtension.kt

@@ -15,6 +15,9 @@ import javax.naming.OperationNotSupportedException
  *
  * ```
  * dependencyAnalysis {
+ *   // Declare that this subproject is an "application"-type subproject.
+ *   app()
+ *
  *   // Configure ABI analysis.
  *   abi { ... }
  *