chore(test-apps): improve developer message with test apps (#28917)

Issue number: N/A

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## What is the current behavior?
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## What is the new behavior?
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- Improves the developer message when generating a test app to include
the next steps to running the test app.

## Does this introduce a breaking change?

- [ ] Yes
- [x] No

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## Other information

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packages/vue/test/build.sh

@@ -31,3 +31,13 @@ cp -R $FULL_BASE_DIR $BUILD_APP_DIR
 # Then we can copy the specific app which
 # will override any files in the base application.
 cp -R $FULL_APP_DIR $BUILD_APP_DIR
+
+GREEN='\033[0;32m'
+NC='\033[0m' # No Color
+
+# Print a message with instructions for developers.
+echo -e "\n${GREEN}Successfully generated test app at: $BUILD_APP_DIR \n${NC}"
+echo -e "Please follow these steps:"
+echo -e "  1. cd $BUILD_APP_DIR"
+echo -e "  2. Install dependencies with: pnpm install"
+echo -e "  3. Run the dev server with: pnpm dev\n"