…ons of current borrow checker (borrowing fields of self), what's cool is that is _did_ compile with -Zpolonius.

- Removing the System concept completly is not feasible
- Instead of a Struct, System is now a trait
- Added back agnostic display manager
- Added back some states
- Added back the application_manager, however it is currently crippled -
  need to rethink the impl for FFI

- add back uop & notification state

… pointers to all structs, which in turn cast to their concrete types on the kernel implementation side

- add back info state, will less info for now
- Add all the states back to display_manager

Instead of passing the display across the threshold, there is a new
Display trait which exposes FrameBuffer a FFI safe representation of the
frame buffer

- This is easier to send over FFI, no longer a Table entry is needed.
- Safer, casting from *mut () didn't feel right
- Harder to encaptulate display details, i.e pixel format- but we could
  suppliment FrameBuffer with this information.

  A big refactor and deps update may be required soon. I had to jump
  through some hoops for implementing the display wrapper. But it works
  for now.

- Add rtt logging interface
- Implement Display trait for the ssd1351 (kinda hacky, have to switch
  between eg crates)
- Add FB mut method to ssd1351 (need to bump or patch release for this)
- Removed Event from ingress_manager, back to passing System in

… types

- Update `SetupFn` to take a pointer to the Table
- Fixed bug where apps would try and access unitialized memory instead
  of Context/Table
- Add commented code for preloading an app