Automated Greeting Workflow

I propose to create a GitHub workflow named "Greetings". This workflow will automatically greet users who create new issues or pull requests in this repository. The Greeting will look like "Hi there! Thanks for opening this issue. We appreciate your contribution to this open-source project. We aim to respond or assign your issue as soon as possible."

Please assign this issue to me.

No files or tests are named. Start by reading the GitHub Actions workflow documentation and checking whether this repository already has workflows. Done means a workflow named "Greetings" greets users who open issues or pull requests with the requested message.

Written by the indexing model from the issue text.