Add 'Show Password' Option when creating a new Sentry org

### Problem Statement

On the signup page, when creating a new org there is no option to 'show password' to ensure that it was entered correctly.

### Solution Brainstorm

Either allowing for the password to be shown, or enforcing that users enter it twice to ensure that the password is correctly entered. This would avoid confusion and the user needing to immediately needing to reset their password and go through that flow by allowing them to check it at the start, or enforcing its correctly entered with an added 'confirm password' in a second entry spot.

### Product Area

Sign In

Start at the signup page described in the issue and trace the Sign In product area to locate the new-organization password form. Check the existing password-field behavior and related tests, if present. Done means users can verify the password during signup through the selected interaction and the signup flow remains functional.

Written by the indexing model from the issue text.