[Feature]: Add GitHub Action Workflow for Greeting Contributors

[harmeetsingh11]

Description: The current project lacks an automated action to greet contributors. GitHub Actions can significantly enhance project automation. I propose adding a GitHub Action workflow to greet new pull request (PR) and issue creators, fostering a welcoming environment.

Motivation, pitch

Proposed Changes: Implement a GitHub Action workflow that triggers on new PRs and issues. The workflow should include a greeting message to acknowledge and appreciate the contributors for their efforts.

Expected Behavior: When contributors create new PRs or issues, the GitHub Action should automatically trigger and post a welcoming message, acknowledging their contributions.

Checklist

• [X] I have checked the existing issues
• [X] I have read the Contributing Guidelines
• [X] I am willing to work on this issue (optional)
• [X] I am a SWOC'24 contributor

[chandansgowda]

Hey @harmeetsingh11, Do you want to work on this issue ?

[harmeetsingh11]

@chandansgowda yes!

[HimaTeju]

@chandansgowda I believe this issue is still not resolved, I have linked a PR please look into it.