Add system Endpoint for System Informations

[cn-tools]

Summary

This pull request introduces a new system endpoint that provides access to system-level information through a dedicated API.

Motivation

There was previously no centralized way to retrieve general system information, such as the currently deployed application version. The new endpoint establishes a standard interface for exposing such metadata.

Changes

• Added a new /system endpoint.
• Exposed system-related information through a dedicated API.
• Implemented retrieval of the currently running application version.
• Designed the endpoint to be easily extensible for additional system information in the future.

Benefits

• Simplifies identification of the currently deployed version.
• Supports monitoring, troubleshooting, and operational processes.
• Provides a centralized and consistent source for system metadata.

Impact

• No breaking changes.
• Existing endpoints and functionality remain unaffected.

Example Response

{
  "version": "1.6.1"
}