add rundts task

Author: YunchuWang

samples/build.gradle

@@ -1,18 +1,19 @@
 plugins {
     id 'org.springframework.boot' version '2.5.2'
     id 'java'
-    id 'application'
 }
 
 group 'io.durabletask'
 version = '0.1.0'
 def grpcVersion = '1.59.0'
 archivesBaseName = 'durabletask-samples'
 
-application {
+task runWebAppToDurableTaskSchedulerSample(type: JavaExec) {
+    classpath = sourceSets.main.runtimeClasspath
     mainClass = 'io.durabletask.samples.WebAppToDurableTaskSchedulerSample'
 }
 
+
 dependencies {
     implementation project(':client')
     implementation project(':azuremanaged')