Merge: login and browse page finished, final commit

backend/src/main/java/hu/pazmany/Controller.java

backend/src/main/java/hu/pazmany/Document.java

backend/src/main/java/hu/pazmany/DocumentDto.java

backend/src/main/java/hu/pazmany/ExampleController.java

backend/src/main/java/hu/pazmany/NoteStoreService.java

backend/src/main/java/hu/pazmany/Subject.java

backend/src/main/java/hu/pazmany/SubjectDto.java

backend/src/main/java/hu/pazmany/User.java

backend/src/main/java/hu/pazmany/UserLoginDto.java

backend/src/main/java/hu/pazmany/UserService.java

...ain/resources/1.eloadas_szoftvertechnologia_2024_v1.0.pdf

...ain/resources/3.eloadas_szoftvertechnologia_2024_v1.0.pdf

backend/src/main/resources/application.properties

backend/src/main/resources/data.direktnemsqlakiterjesztes

frontend/jsconfig.json

frontend/package-lock.json

frontend/package.json

frontend/src/App.vue

frontend/src/assets/main.css

frontend/src/assets/user.svg