Move dependencies to gradle version catalog and clean up buildscripts

buildSrc/settings.gradle.kts

@@ -0,0 +1,11 @@
+dependencyResolutionManagement {
+    repositories {
+        mavenCentral()
+        gradlePluginPortal()
+    }
+    versionCatalogs {
+        register("libs") {
+            from(files("../gradle/libs.versions.toml")) // include from parent project
+        }
+    }
+}