[CLI IMPROVEMENT] improved cli message for new cmd

cli/ballerina-cli/src/main/java/io/ballerina/cli/cmd/BuildCommand.java

@@ -304,6 +304,13 @@ public void execute() {
                 .build();
 
         taskExecutor.executeTasks(project);
+        Path targetDirPath = project.sourceRoot().resolve("target");
+        String packageName = project.sourceRoot().getFileName().toString();
+        String jarFileName = packageName+".jar"; 
+    Path jarFilePath = targetDirPath.resolve("bin").resolve(jarFileName);
+        outStream.println("What's next?");
+        outStream.println("Execute java -jar " + jarFilePath.toString() + " to run the program");
+
         if (this.exitWhenFinish) {
             Runtime.getRuntime().exit(0);
         }

cli/ballerina-cli/src/main/java/io/ballerina/cli/cmd/NewCommand.java

@@ -305,6 +305,31 @@ public void execute() {
                 packagePath = Paths.get(argList.get(0));
             }
             errStream.println("Created new package '" + packageName + "' at " + packagePath + ".");
+            errStream.println("What's next");
+             switch (template) {
+                case "main":
+                    errStream.println("Execute the below command to build the executable JAR file:");
+                    errStream.println("\t bal build " + packageName);
+                    break;
+
+                case "service":
+                    errStream.println("Execute the below command to run the service:");
+                    errStream.println("\t bal run " + packageName);
+                    errStream.println("Else, execute the below command to build the executable JAR file:");
+                    errStream.println("\t bal build " + packageName);
+                    break;
+
+                case "lib":
+                    errStream.println("Execute the below command to create the Ballerina archive:");
+                    errStream.println("\t bal pack " + packageName);
+                    break;
+
+                default:
+                    errStream.println("Execute the below command to run the program:");
+                    errStream.println("\t bal run " + packageName);
+
+                    break;
+            }
         }
         if (this.exitWhenFinish) {
             Runtime.getRuntime().exit(0);

cli/ballerina-cli/src/main/java/io/ballerina/cli/cmd/PackCommand.java

@@ -174,6 +174,7 @@ public void execute() {
             }
         } catch (ProjectException e) {
             CommandUtil.printError(this.errStream, e.getMessage(), null, false);
+
             CommandUtil.exitError(this.exitWhenFinish);
             return;
         }
@@ -265,6 +266,10 @@ public void execute() {
                 .addTask(new DumpBuildTimeTask(outStream), !project.buildOptions().dumpBuildTime())
                 .build();
 
+                outStream.println("What's Next");
+                outStream.println("Execute the below command to publish the package to Ballerina Central.");
+                outStream.println("\t bal push ");
+
         taskExecutor.executeTasks(project);
         if (this.exitWhenFinish) {
             Runtime.getRuntime().exit(0);

cli/ballerina-cli/src/test/java/io/ballerina/cli/cmd/NewCommandTest.java

@@ -198,6 +198,11 @@ public void testNewCommandInExistingDirectory() throws IOException {
                 """;
         Assert.assertEquals(gitignoreContent.trim(), expectedGitignoreContent.trim());
         Assert.assertTrue(readOutput().contains("Created new package"));
+        Assert.assertTrue(output.contains("What's next"));
+        Assert.assertTrue(output.contains("Execute the below command to run the program:"));
+        Assert.assertTrue(output.contains("\t bal run " + name));
+        Assert.assertTrue(output.contains("Else, execute the below command to build the executable JAR file:"));
+        Assert.assertTrue(output.contains("\t bal build " + name));
 
         Assert.assertTrue(Files.exists(packageDir.resolve(".devcontainer.json")));
         String devcontainerContent = Files.readString(packageDir.resolve(".devcontainer.json"));