"Removed itemMode enums and incomes in AddExpenseController. Changed controller of AddIncome to AddIncomeController"

Attempted to make expense and income the same class. Made new dialog box for income. Made new enum to distinguish between incoem and expense

Reconfigured pom file for updated javafx version. Redesigned addExpense, Expenses and MainMenu, which is reflected in the fxml files

Commented out sections of code relating to expense overview. Connected all fxml files to the same controller