Merge branch 'frontend-testing' of gitlab.stud.idi.ntnu.no:andreksv/idatt-1002-2023-9 into frontend-testing

Income switches to new budget window

See merge request !27

# Conflicts:
#   src/main/java/no/ntnu/idatt1002/demo/controller/AddExpenseController.java
#   src/main/java/no/ntnu/idatt1002/demo/controller/AddIncomeController.java
#   src/main/java/no/ntnu/idatt1002/demo/controller/BudgetController.java
#   src/main/java/no/ntnu/idatt1002/demo/controller/ExpensesController.java
#   src/main/java/no/ntnu/idatt1002/demo/controller/IncomeController.java
#   src/main/java/no/ntnu/idatt1002/demo/controller/MainMenuController.java
#   src/main/resources/Budget/Budget.budget
#   src/main/resources/Economics/Expense.register
#   src/main/resources/Economics/Income.register
#   src/main/resources/view/BudgetNew.fxml
#   src/main/resources/view/Expenses.fxml

"Added method for pie chart in BudgetController. Refactored switchScene(). Implemented saveDataToFile()"

"Fixed recursive function bug in refreshPieChart. Extracted refresh methods. Implemented delete in SceneBuilder"

"Created interfaces for expense, income and budget controller and their respective dialog box controllers"

Merging frontend-testing with master

See merge request !24