Improve Handling of Stale Pull Requests

[AdityyaX]

Current Behavior

Currently, inactive PRs are not marked as stale after a set period of inactivity.

Desired Behavior

Screenshots / Mockups

Implementation

Using Github actions for managing stale pull request

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]

Checklist

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

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