- Move Terminal, TerminalOptions, ViewPort, CompletedFrame, Frame to
ratatui-core crate
- Move render_widget_ref() and render_stateful_widget_ref() to extension
trait (FrameExt) due as the Ref types are unstable and kept in the
main lib instead of -core
- Fix rustdoc errors / feature config issues
BREAKING CHANGE: to call `Frame::render_widget_ref()` or
`Frame::render_stateful_widget_ref()` you now need to import the
FrameExt trait from `ratatui::widgets` and enable the
`unstable-widget-ref` feature.
Co-authored-by: Orhun Parmaksız <orhunparmaksiz@gmail.com>