Integrated beRi CLI.

[grabear]

• Develop standalone CLI's for renv, rut, and rinse using click
  • Build beRi CLI by grouping the standalone CLI.
  • Make sure the standalone CLI's can always be used with or without beRi.
• Design a file-system for beRi in ~/.beRi or ~/.local/beRi with cookiecutter
  • R installs by default in .beRi file system
  • packages install by default to .beRi file system
  • projects are stored in .beRi file system
  • repos are stored in .beRi file system
  • beRi - configuration file (~/.beRi/<file_name>.yaml)