more prep for included-build Gradle plugins

gradle-plugins/factorio-mod-manager/settings.gradle.kts

@@ -2,30 +2,11 @@
 
 rootProject.name = "factorio-mod-manager"
 
-
 pluginManagement {
+  @Suppress("UnstableApiUsage")
   includeBuild("../settings-plugins/")
 }
 
-
-dependencyResolutionManagement {
-  repositoriesMode.set(RepositoriesMode.PREFER_SETTINGS)
-
-  repositories {
-    mavenCentral()
-    gradlePluginPortal()
-  }
-
-  pluginManagement {
-    repositories {
-      gradlePluginPortal()
-      mavenCentral()
-    }
-  }
-
-  versionCatalogs {
-    create("libs") {
-      from(files("../../gradle/libs.versions.toml"))
-    }
-  }
+plugins {
+  id("kafkatorio.convention.settings.repositories")
 }