* feat: modal/drawer support append to main content
* feat: modal zIndex support
* fix: drawer prop define
* chore: type
* fix: modal/drawer position fixed while append to body
* docs: typo
* chore: add full-width drawer in content area
* chore: remove unnecessary class
* feat: add modal component
* feat: add drawer component
* feat: apply new modal and drawer components to the layout
* chore: typo
* feat: add some unit tests