Got 3rd party dependencies working in development mode

plugins/igdb/build.gradle.kts

@@ -3,5 +3,29 @@ plugins {
 }
 
 dependencies {
+    // Kotlin annotation processor
     ksp("care.better.pf4j:pf4j-kotlin-symbol-processing:2.0.20-1.0.1")
+
+    // IGDB API client
+    implementation("io.github.husnjak:igdb-api-jvm:1.2.0")
+
+    compileOnly("org.slf4j:slf4j-api:2.0.16")
+}
+
+tasks.register<Copy>("copyDependencyClasses") {
+    dependsOn(tasks.jar)
+
+    duplicatesStrategy = DuplicatesStrategy.EXCLUDE
+
+    from(configurations.runtimeClasspath.get().map { project.zipTree(it) }) {
+        include("**/*.class")
+    }
+    from("src/main/resources/MANIFEST.MF") {
+        into("META-INF")
+    }
+    into(layout.buildDirectory.get().asFile.resolve("classes/kotlin/main"))
+}
+
+tasks.build {
+    dependsOn("copyDependencyClasses")
 }