repl: add replDefaults to customize the writer

So far it was not possible to modify the inspection defaults used by
the REPL from the running instance itself. This introduces a new
property on `util.inspect` which is only used inside the REPL and which
allows to modify the used inspection defaults at any point of time.

PR-URL: https://github.com/nodejs/node/pull/26375


Reviewed-By: James M Snell <jasnell@gmail.com>