than_pkg_linux library

1. than_pkg package
2. documentation
3. than_pkg_linux.dart

than_pkg package

1. Libraries
2. enums/screen_orientation_types
3. than_pkg
4. than_pkg_android
5. than_pkg_interface
6. than_pkg_linux
7. than_pkg_method_channel
8. than_pkg_platform_interface
9. video_linux_services