added spinner and success message to seed command

Author: Vieltojarvi

packages/cli/src/commands/sandbox/sandbox-seed/sandbox_seed_command.test.ts

@@ -107,6 +107,10 @@ void describe('sandbox seed command', () => {
       const output = await commandRunner.runCommand('sandbox seed');
 
       assert.ok(output !== undefined);
+      assert.strictEqual(
+        output.trimEnd(),
+        '✅ seed has successfully completed'
+      );
       assert.strictEqual(mockHandleProfile.mock.callCount(), 1);
     });
   });

packages/cli/src/commands/sandbox/sandbox-seed/sandbox_seed_command.ts

@@ -5,6 +5,7 @@ import { execa } from 'execa';
 import { SandboxBackendIdResolver } from '../sandbox_id_resolver.js';
 import { AmplifyUserError } from '@aws-amplify/platform-core';
 import { SandboxCommandGlobalOptions } from '../option_types.js';
+import { printer } from '@aws-amplify/cli-core';
 
 /**
  * Command that runs seed in sandbox environment
@@ -35,6 +36,7 @@ export class SandboxSeedCommand implements CommandModule<object> {
    * @inheritDoc
    */
   handler = async (): Promise<void> => {
+    printer.startSpinner('runSeedSpinner', '');
     const backendID = await this.backendIDResolver.resolve();
     const seedPath = path.join('amplify', 'seed', 'seed.ts');
     await execa('tsx', [seedPath], {
@@ -44,6 +46,8 @@ export class SandboxSeedCommand implements CommandModule<object> {
         AMPLIFY_BACKEND_IDENTIFIER: JSON.stringify(backendID),
       },
     });
+    printer.stopSpinner('runSeedSpinner');
+    printer.print('✅ seed has successfully completed');
   };
 
   /**