This PR contains the work done to implement the `Open` subcommand to the `colibri` executable, which open a *Hummingbird* project with either Visual Studio Code or Xcode.
Reviewed-on: #9
Co-authored-by: Javier Cicchelli <javier@rock-n-code.com>
Co-committed-by: Javier Cicchelli <javier@rock-n-code.com>