refactor buildSrc scripts to root directory

buildSrc/src/main/kotlin/DependencyConfig.kt

@@ -0,0 +1,44 @@
+import org.gradle.api.Project
+import org.gradle.kotlin.dsl.creating
+import org.gradle.kotlin.dsl.dependencies
+import org.gradle.kotlin.dsl.getValue
+import org.gradle.kotlin.dsl.getting
+import org.gradle.kotlin.dsl.repositories
+
+fun Project.configureDependencies() {
+    val api by configurations.getting
+    val implementation by configurations.getting
+    val testImplementation by configurations.getting
+    val compileOnly by configurations.getting
+    
+    val shaded by configurations.creating
+    
+    @Suppress("UNUSED_VARIABLE")
+    val shadedApi by configurations.creating {
+        shaded.extendsFrom(this)
+        api.extendsFrom(this)
+    }
+    
+    @Suppress("UNUSED_VARIABLE")
+    val shadedImplementation by configurations.creating {
+        shaded.extendsFrom(this)
+        implementation.extendsFrom(this)
+    }
+    
+    repositories {
+        mavenCentral()
+        gradlePluginPortal()
+        maven { url = uri("https://maven.fabricmc.net/") }
+        maven { url = uri("https://papermc.io/repo/repository/maven-public/") }
+        maven { url = uri("https://repo.codemc.org/repository/maven-public") }
+    }
+    
+    dependencies {
+        testImplementation("org.junit.jupiter:junit-jupiter-api:5.7.0")
+        testImplementation("org.junit.jupiter:junit-jupiter-engine:5.7.0")
+        compileOnly("org.jetbrains:annotations:23.0.0")
+        
+        compileOnly("com.google.guava:guava:30.0-jre")
+        testImplementation("com.google.guava:guava:30.0-jre")
+    }
+}