Adding a Workflow for greetings to new issue

[aditiverma-21]

📋 Description

This workflow runs whenever a new issue or pull request is opened. Greet User: It uses the actions-ecosystem/action-create-comment action to post a customized comment directly on the issue or pull request. Personalized Message: The message greets the user by username and dynamically adjusts based on whether it’s an issue or pull request. It also includes a link to the contribution guidelines for new contributors.

Fixes #16

🚨 Checklist:

• [x] My code follows the style guidelines of this project.
• [x] I have performed a self-review of my own code.
• [x] I have commented my code, particularly in hard-to-understand areas.
• [x] I have made corresponding changes to the documentation.
• [x] My changes generate no new warnings.
• [x] I have added tests that prove my fix is effective or that my feature works.
• [x] New and existing unit tests pass locally with my changes.
• [x] Any dependent changes have been merged and published in downstream modules.

[yashksaini-coder]

Thank you for your contribution @aditiverma-21

[aditiverma-21]

@yashksaini-coder Please add labels. gssco-ext and level labels

please add level label

[aditiverma-21]

Please add level label and gssoc ext label

[yashksaini-coder]

Please add level label and gssoc ext label

Please refer to this #19

[aditiverma-21]

Okay Thank you and sorry for the misunderstanding.

[yashksaini-coder]

Okay Thank you and sorry for the misunderstanding.

No problem.