registry: update example to include AWS provider usage

Add registry-aws dependency to examples/pom.xml. Update Main.java to use
generic placeholder endpoints, add REGION constant, and pass withRegion()
to the client builder to support running the example with AWS ECR.

Made-with: Cursor

Author: iamabhilaksh

examples/pom.xml

@@ -126,6 +126,11 @@
             <artifactId>registry-gcp</artifactId>
             <version>${project.version}</version>
         </dependency>
+        <dependency>
+            <groupId>com.salesforce.multicloudj</groupId>
+            <artifactId>registry-aws</artifactId>
+            <version>${project.version}</version>
+        </dependency>
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-api</artifactId>

examples/src/main/java/com/salesforce/multicloudj/registry/Main.java

@@ -30,9 +30,10 @@ public class Main {
 
   // Constants
   private static final String DEFAULT_PROVIDER = "gcp";
-  private static final String REGISTRY_ENDPOINT = "https://us-docker.pkg.dev";
-  private static final String REPOSITORY = "my-project/my-repo/my-image";
+  private static final String REGISTRY_ENDPOINT = "https://your-registry-endpoint";
+  private static final String REPOSITORY = "your-repository";
   private static final String TAG = "latest";
+  private static final String REGION = "your-region";
 
   // Demo settings
   private static final BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
@@ -163,6 +164,7 @@ private static void showSectionHeaderWithPause(String title) {
   private ContainerRegistryClient initializeClient() {
     return ContainerRegistryClient.builder(provider)
         .withRegistryEndpoint(REGISTRY_ENDPOINT)
+        .withRegion(REGION)
         .build();
   }
 
@@ -296,6 +298,7 @@ private void demonstratePlatformSelection() {
     try (ContainerRegistryClient client =
         ContainerRegistryClient.builder(provider)
             .withRegistryEndpoint(REGISTRY_ENDPOINT)
+            .withRegion(REGION)
             .withPlatform(arm64)
             .build()) {