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

Here is a version where the program finds the fxml file and runs correctly. Nothing after first window popup