Rewrite plugin, use filenames in lockfile

fixtures/projects/settings/buildscript/groovy/settings.gradle

@@ -0,0 +1,11 @@
+buildscript {
+    repositories {
+        maven {
+            url System.getProperty("org.nixos.gradle2nix.m2")
+            allowInsecureProtocol true
+        }
+    }
+    dependencies {
+        classpath 'org.apache:test:1.0.0'
+    }
+}

fixtures/projects/settings/dependency-resolution-management/kotlin/build.gradle.kts

@@ -0,0 +1,8 @@
+
+plugins {
+    java
+}
+
+dependencies {
+    implementation("org.apache:test:1.0.0")
+}

fixtures/projects/settings/dependency-resolution-management/kotlin/settings.gradle.kts

@@ -0,0 +1,9 @@
+dependencyResolutionManagement {
+    repositories {
+        maven {
+            url = uri(System.getProperty("org.nixos.gradle2nix.m2"))
+            isAllowInsecureProtocol = true
+        }
+    }
+    repositoriesMode.set(RepositoriesMode.PREFER_SETTINGS)
+}