I'm converting a build that has logic in the build.gradle.kts to encapsulate it in a Kotlin plugin. However I'm not sure how to update the buildscript classpath to load a thirdparty plugin from within my custom plugin. Currently the build pulls in the thirdparty plugin using the build.gradle.kts "plugins {}" config block and in the settings.gradle file a pluginManagment block redirects the request to an internal Maven proxy. How do you update the buildscript classpath to load a third party plugin from within a custom plugin in Kotlin-DSL? I don't want my customer to need to know about or have to configure the thirdparty plugin in the main build.gradle.kts file... I want to delegate all that logic to the custom plugin.