Add data column

[TurtIeSocks]

• Allow custom user fields to be added and saved in the user table
• Data json column handles the data dynamically
• Includes migration
• Dynamically creates TextField inputs on the profile page for any number of fields you add to your config
• Can be formatted as an array of strings or array of objects
• If you use a string, the string is used as the name that is displayed and saved in the db json
• If you use objects, you have extra customization:
• You can have different locales displayed, use the locales as the keys and the display name as the value
• Use the name key as the fallback for any missing locales
• Use the database key as the key that will be saved in the database json

{
        "extraUserFields": [
        "paypal_name",
        {
          "name": "paypal",
          "en": "paypal",
          "es": "spanish_paypal",
          "database": "paypal_ish"
        }
      ]
}

Resolves #573