Merge branch 'cleanup-admins' into 'development'

build.gradle.kts

src/main/java/nl/tudelft/ewi/queue/QueueApplication.java

...java/nl/tudelft/ewi/queue/controller/AdminController.java

...a/nl/tudelft/ewi/queue/csv/FirstYearStudentCsvHelper.java

...n/java/nl/tudelft/ewi/queue/dto/create/RoomCreateDTO.java

src/main/java/nl/tudelft/ewi/queue/dto/patch/Patch.java

...ain/java/nl/tudelft/ewi/queue/dto/patch/RoomPatchDTO.java

...java/nl/tudelft/ewi/queue/model/FirstYearMentorGroup.java

...ain/java/nl/tudelft/ewi/queue/model/FirstYearStudent.java

src/main/java/nl/tudelft/ewi/queue/service/AdminService.java

src/main/resources/templates/admin/rooms.html

src/main/resources/templates/admin/rooms/edit.html