fix(layout): correct dimensions assignment in container content calculation

fix: size providing problem in !Visible overflow

fix: overflow mode's area calculation problem

fix: scroll event no response problem

feat: event bubble support

docs: update README

pre-feat: add overflow(scrollable) support (temporary no events)

docs: update readme(badge of ratatui)

refactor: layout encapsulation

fix: bg color will now correctly overlap

feat: z-index

refactor : extract ui message handler

refactor: encapsulate layout calculation

fix: handles completion

feat: console system