CI/CD: Duplicate issue detector and labeller as "duplicate"

### Is your feature request related to a problem?

- [x] Yes, it is related to a problem

### Describe the feature you'd like

**Problem**: Contributors must manually search through many existing issues before creating a new one, which is time-consuming and often leads to duplicate reports.

**How**: Add automated duplicate detection using a GitHub bot (semantic matching) and a lightweight GitHub Action to flag similar existing issues on creation.

****Impact**: it will mark that issue duplicate so that maintainer don't have to waste too much time**

Notes: Automation will only suggest possible duplicates (no auto-closing, or auto-closing depends on choice) .

### Record

- [x] I agree to follow this project's Code of Conduct
- [x] I want to work on implementing this feature