feat: add GitHub Action to automatically respond to new issues

[dylanpulver]

Description
This pull request adds a new GitHub Action that automatically responds to new issues created in the repository. The action is configured to trigger whenever a new issue is opened and posts a predefined comment thanking the user and acknowledging the issue.

Changes

• Added a new GitHub Action workflow file .github/workflows/issue-responder.yml.
• Configured the workflow to trigger on the issues event with the type opened.
• The action uses actions/github-script@v7 to post a comment on the newly created issue.
• The comment includes the title and body of the issue and a thank-you message.
• The comment will appear as if posted by the account associated with the GITHUB_TOKEN.
• This setup ensures a single response per new issue.