Incremented version code to 3 and updated package unique name to "schmidti.digital.kniffel". Added multiple new texture import files for Retro Windows GUI including buttons, toggles, headers, and other graphical elements.
Replaced multiple OptionButton instances with LineEdit for input fields, including three_of_a_kind, four_of_a_kind, and chance. Updated related scoring logic and adjusted UI themes and assets to reflect the new input method.
