Notification Service to notify single user

[shreya-mishra]

Issue Description

A notification service is necessary to inform users or RDS groups about events when assigned. The service will send notifications, ensuring that people or RDS groups are simply notified about the events.

Current Behavior

we don't have a feature as of now
[Explain what currently happens when this issue is encountered.]

RFC

#307

Environment

• Operating System: [e.g., Windows, macOS, Linux]
• Browser (if applicable): [e.g., Chrome, Firefox, Safari]
• Version of Software/Project: [e.g., v1.0.0]

Additional Information

[Include any additional context, logs, or details that might be helpful in addressing the issue.]

Checklist

• I have read and followed the project's code of conduct.
• I have searched for similar issues before creating this one.
• I have provided all the necessary information to understand and reproduce the issue.
• I am willing to contribute to the resolution of this issue.

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