Add model files without nested repository

...ent/src/test/java/uk/ac/rhul/cs2800/model/cs2800-lab-2024

...del/cs2800-lab-2024/CW1/StudentGradeManagement/.classpath

...del/cs2800-lab-2024/CW1/StudentGradeManagement/.gitignore

...s2800-lab-2024/CW1/StudentGradeManagement/.mvn/jvm.config

...800-lab-2024/CW1/StudentGradeManagement/.mvn/maven.config

...model/cs2800-lab-2024/CW1/StudentGradeManagement/.project

...radeManagement/.settings/org.eclipse.core.resources.prefs

...udentGradeManagement/.settings/org.eclipse.jdt.core.prefs

...udentGradeManagement/.settings/org.eclipse.m2e.core.prefs

.../model/cs2800-lab-2024/CW1/StudentGradeManagement/pom.xml

...nagement/src/main/java/uk/ac/rhul/cs2800/model/Grade.java

...agement/src/main/java/uk/ac/rhul/cs2800/model/Module.java

...t/src/main/java/uk/ac/rhul/cs2800/model/Registration.java

...gement/src/main/java/uk/ac/rhul/cs2800/model/Student.java

...hul/cs2800/model/exception/NoGradeAvailableException.java

.../rhul/cs2800/model/exception/NoRegistrationException.java

...ment/src/test/java/uk/ac/rhul/cs2800/model/GradeTest.java

...ent/src/test/java/uk/ac/rhul/cs2800/model/ModuleTest.java

...c/test/java/uk/ac/rhul/cs2800/model/RegistrationTest.java

...nt/src/test/java/uk/ac/rhul/cs2800/model/StudentTest.java