Fixes <https://issues.guix.gnu.org/56114>.
Reported by Maxime Devos <maximedevos@telenet.be>.
* guix/monad-repl.scm (%build-verbosity): New variable.
(evaluate/print-with-store): New procedure.
(run-in-store): Rewrite in terms of 'evaluate/print-with-store'.
(verbosity, lower, build): New meta-commands.
* doc/guix.texi (Using Guix Interactively): New node.
(The Store Monad): Link to it.
(Invoking guix repl): Likewise.
* doc/contributing.texi (Running Guix Before It Is Installed): Refer to
it.
(The Perfect Setup): Suggest 'guix install' rather than 'guix package -i'.
* guix/monad-repl.scm (store-monad-language): Add 'store' parameter and
use it. Remove call to 'open-connection'.
(enter-store-monad): Use 'with-store' and pass the store to
'store-monad-language.
