- got text boxes fully working

- this includes text wrapping not cutting words in half (can be disabled using a method on the text box)
- refactored frame.rs, cg_core.rs and cg_widgets.rs to avoid code reuse and duplication
- created a simplified unified interface for rendering frames to the screen using the Frame struct provided by frame.rs instead of Element, FrameGen, etc.
- moved all widgets from cg_core.rs to cg_widgets.rs
- the label widget now works
- also added CgIndicatorBar and CgIndicatorWidget widgets to eventually make a working status bar
- refactored all applications in the system to use the new api to render to the screen

src/user/bin/tetris.rs

@@ -8,7 +8,6 @@ use crate::{serial_print, serial_println};
 use crate::std::application::{Application, Error};
 use crate::std::io::Screen;
 use crate::user::lib::coords::{Direction, Position, PositionReal};
-use crate::user::lib::libgui_old_archive::libgui_core::Pos;
 
 
 pub(crate) struct TetrisEngine {