logging: add README for logging example

Author: ShivamPatidar24

showcases/logging/README.md

@@ -0,0 +1,80 @@
+# Logging Showcase Example
+
+## Overview
+
+This showcase demonstrates the logging capabilities.
+
+A new **Logging example** has been added to the showcase launcher. When running:
+
+```bash
+./score_starter
+```
+
+select **Logging example** from the menu to start the application.
+
+The example generates log messages with different severity levels and demonstrates both local and remote logging.
+
+---
+
+## What the Example Shows
+
+The application produces logs for the following levels:
+
+- DEBUG
+- INFO
+- WARN
+- ERROR
+- FATAL
+
+These logs can be viewed in the console as well as through remote logging tools.
+
+---
+## Remote Logging
+
+The example forwards logs through DataRouter.
+
+For remote logging:
+
+- Log messages are sent to the multicast IP address `239.255.42.99` and port configured in `log-channels.json`.
+- Select the appropriate network interface depending on the environment where the showcase is running. For example,   if running the showcase in a Linux x86 Docker environment, use the Docker network interface
+- DataRouter receives the log stream and exposes it through the default DLT port (`3490`).
+- Logs can be viewed by connecting DLT Viewer or Chipmunk to the configured DataRouter endpoint.
+
+
+### DLT Viewer
+
+DLT Viewer Configuration
+
+<img src="images/dlt-viewer.png" alt="DLT Viewer Configuration" width="800">
+
+### Chipmunk
+
+Configure Chipmunk using the same network settings.
+
+<img src="images/chipmunk.png" alt="Chipmunk Configuration" width="800">
+
+Once connected, the incoming log stream can be monitored in real time.
+
+---
+
+## Verification
+
+Verify that:
+
+- The Logging example starts successfully.
+- DEBUG messages are received.
+- INFO messages are received.
+- WARN messages are received.
+- ERROR messages are received.
+- FATAL messages are received.
+- Logs are visible in DLT Viewer.
+- Logs are visible in Chipmunk.
+- Remote log forwarding through DataRouter is working correctly.
+
+---
+
+## Example Log Output
+
+### Chipmunk Logs
+
+<img src="images/chipmunk-log.png" alt="Chipmunk Logs" width="800">