Feat: add github action to lock new issues

**Is your feature request related to a problem? Please describe.**
This repository has 300+ issues. Issues receive more comments as a whole. As a result, the number of desktop and mobile notifications rises, making their management challenging for repository maintainers, admins.

**Describe the solution you'd like**
I will add the github action workflow, which will lock new new issues. This means that, when the new issue is created, it will be locked. The issue will be unlocked when the maintainer/admin will add `status: ready for dev` label to it. The admins and maintainers would greatly benefit from this, and it would also reduce notifications.

**Record**
- [x] I agree to follow project's contribution guidelines and code of conduct.
- [x] I'm a GSSoC'23 contributor.
- [x] I want to work on this issue.

Thanks