`direnv x` alias for `direnv exec .`

Is your feature request related to a problem? Please describe.

direnv exec . is long to type. While direnv is clearly optimized for being integrated with the shell, this is not always possible or desired, especially for occasional contributors to some project that don't like some choices the repo author made with their .envrc.

Describe the solution you'd like

I'd like direnv x blah to be equivalent to direnv exec . blah.

Describe alternatives you've considered

Do nothing.

Additional context

The idea comes from mise x command. For direnv, it's more useful because direnv exec also requires a PATH argument.

direnv already has some aliases, e.g. direnv block, direnv deny, and direnv refuse are all the same.

This would be quick to implement, the only question is if such a feature is considered acceptable.