New "Open to Work" screen

[jmgasper]

Figma: https://www.figma.com/file/cqfqcGos3CXJCDjMVmmbwf/Onboarding---UI-Design?type=design&node-id=126-20608&mode=design&t=oKVQkfciAcLbwK58-0

This ticket will track adding in a new step 2 to the onboarding flow, after the skills entry, matching the look and feel shown in the Figma above.

The Open to Work field is kept in the personalization trait on the member traits, specifically the availableForGigs flag like:

    {
        "userId": 88778088,
        "traitId": "personalization",
        "categoryName": "Personalization",
        "traits": {
            "traitId": "personalization",
            "data": [
                {
                    "userConsent": false
                },
                {
                    "availableForGigs": false
                }
            ]
        },
        "createdAt": 1660674005761,
        "updatedAt": 1688524356042,
        "createdBy": 88778088,
        "updatedBy": 88778088
    },

NOTE - when the user is new, they will not have the personalization trait on their account at all, so we will need to add it.

If the user already has the personalization trait, and the availableForGigs flag is already set, that should be reflected in the initial state of this screen when it's loaded for the user.

Screen

[suppermancool]

@jmgasper done in #714

[jmgasper]

@suppermancool - One issue noted here. With a newly created user, when I got to this screen, the checkbox was already checked, which is a fine default state, but when I clicked Next, no trait was saved to the user to store the availableForGigs=true field. We need to make sure we handle the case where there's no personalization trait at all for a user, which is the case for a newly created member.

[suppermancool]

@jmgasper done in #715