Feat/explore albums

src/main/java/NTNU/IDATT1002/ApplicationState.java

src/main/java/NTNU/IDATT1002/controllers/CreateAlbum.java

src/main/java/NTNU/IDATT1002/controllers/DataExchange.java

src/main/java/NTNU/IDATT1002/controllers/ExploreAlbums.java

src/main/java/NTNU/IDATT1002/models/User.java

src/main/java/NTNU/IDATT1002/repository/UserRepository.java

src/main/java/NTNU/IDATT1002/service/ImageAlbumService.java

src/main/resources/NTNU/IDATT1002/create_album.fxml

src/main/resources/NTNU/IDATT1002/explore_albums.fxml

...t/java/NTNU/IDATT1002/repository/LoginRepositoryTest.java