update gradle configuration and wrapper

build.gradle.kts

@@ -0,0 +1,45 @@
+plugins {
+    java
+    alias(libs.plugins.run.velocity)
+}
+
+group = "com.uravgcode"
+version = "1.0"
+
+java {
+    toolchain.languageVersion.set(JavaLanguageVersion.of(21))
+}
+
+dependencies {
+    compileOnly(libs.velocity.api)
+    annotationProcessor(libs.velocity.api)
+}
+
+tasks {
+    withType<JavaCompile>().configureEach {
+        options.encoding = "UTF-8"
+        options.release.set(21)
+    }
+
+    runVelocity {
+        velocityVersion("3.4.0-SNAPSHOT")
+    }
+}
+
+val templateSource = file("src/main/templates")
+val templateDest = layout.buildDirectory.dir("generated/sources/templates")
+
+val generateTemplates by tasks.registering(Copy::class) {
+    val props = mapOf("version" to project.version)
+    inputs.properties(props)
+
+    from(templateSource)
+    into(templateDest)
+    expand(props)
+}
+
+sourceSets {
+    named("main") {
+        java.srcDir(generateTemplates.map { it.outputs })
+    }
+}