Create Tournament Implementation

BinTree/src/main/java/BinTree.java

BinTree/src/main/java/Main.java

...backend/src/main/java/hdm/mi/sthbackend/model/Player.java

...end/src/main/java/hdm/mi/sthbackend/model/Tournament.java

sth-frontend/.env

sth-frontend/.env.developement

sth-frontend/.env.production

sth-frontend/package-lock.json

sth-frontend/package.json

sth-frontend/src/App.jsx

sth-frontend/src/components/Button.jsx

sth-frontend/src/components/TournamentForm.jsx

...nd/src/features/tournament/components/BracketingRound.jsx

sth-frontend/src/features/tournament/services/index.js

...end/src/features/tournament/services/tournamentService.js

sth-frontend/src/layouts/Navbar.jsx

sth-frontend/src/utils/errors/httpResponseError.js