Update README.md

UI Update: Command to run text now scrollable

UI Update

Code refactoring: Remove redundant Processor Mode Select command

Change JoyPad options from radio buttons to a dropdown

Update Rockwell Text

Code refactoring: Change Processor Mode from RadioButtons to a ComboBox

Code refactoring: Inline LaunchEmulatorCommandCanExecute code

Code refactoring: Update Emulator Path Validations

Code refactoring: Validation States don't have to be ViewModel properties

Code refactoring: Move Validations to own classes

Code refactoring: Hexadecimal validations

OpenFilePicker Patterns cannot be empty on Windows

Added build badge to README.md

UI Updates