Dagim H.

[Unlock7]

This pull request adds the complete Student Grade Manager with student registration, grade input, reports, and class statistics in a modular structure

[selimcandalgic]

Good job with the assignment Dagim.
Few things to consider:

1. Try to increase code readability by applying clear spacing and indentation.
2. Make sure to add @Override when overriding the methods ( Student.toString() )
3. Try to use the constants you have defined in the project, MODULE_COUNT in Student.grades for example.
4. It's possible to add students w/o names, would be good to prevent that.

[Unlock7]

Thanks for the feedback!
I’ve noted your comments and will apply them in the next assignments to improve my structure and workflow.
Appreciate the guidance!