v1.2.0

Maintenance for R2024b

1. Update .gitattributes and .gitignore
2. Update workflow files for GitHub and set it to publish results on
   Pages
3. Update code with clearvars in place of clear
4. Add solutions to InstructorResources
5. Update the README with better links and image sizes
6. Update the startup app and the project to start the app
7. Update the SoftwareTests to a new structure and write necessary
   pre/post files
8. Update checkExercise1 as CheckExercise1
9. Remove OldVersions