Add Shadow conventions plugin

build.gradle.kts

@@ -9,4 +9,5 @@ repositories {
 
 dependencies {
     implementation("com.diffplug.spotless:spotless-plugin-gradle:8.1.0")
+    implementation("com.gradleup.shadow:com.gradleup.shadow.gradle.plugin:8.3.9")
 }

src/main/kotlin/net.trueog.shadow-conventions.gradle.kts

@@ -0,0 +1,11 @@
+plugins {
+    id("com.gradleup.shadow")
+}
+
+tasks.shadowJar {
+    archiveClassifier.set("") // Use empty string instead of null.
+    isEnableRelocation = true
+    relocationPrefix = "${project.group}.shadow"
+}
+
+tasks.build { dependsOn(tasks.shadowJar) }