[Feature]: Add the GitHub action workflow for greeting contributors

[JiyaGupta-cs]

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 requests (PR) and issue creators, fostering a welcoming environment.

Proposed Changes:

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

Please assign me this issue under IWOC

[welcome]

Hello there! 👋🏻 Welcome to the IoT-Spot! 🚀⚡️
Thank you and congrats 🎉 for opening your very first issue in this project. Please adhere to our Code of Conduct. 👍🏻 You may submit a PR if you like, make sure to follow our Pull Request Template.
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