Adding Chilean Bogus RUT

### Adding Chilean Bogus RUT to the Bogus.Person class.

### Please provide a code example of what you are trying to achieve

I'm really looking forward to adding a generator for Chilean personal Id (RUT as it is known).

### Please answer any or all of the questions below

* Is the feature something that currently cannot be done?
Yes, this cannot be done since it's a missing feature

* What alternatives have you considered?
I already created my own Extension Method and it works very well.

* Has the feature been requested in the past?
No, I searched on the issues and it does not appear to be requested before

**If the feature request is approved, would you be willing to submit a PR?**

Yes _(Help can be provided if you need assistance submitting a PR)_

The requested entry point is the Bogus.Person class, and the issue notes that a working extension method already exists. Start by locating that class and reviewing how existing personal-ID generators are exposed. Done means the class provides a Chilean RUT generator with behavior consistent with the project's existing generators.

Written by the indexing model from the issue text.