Improve ConnectAccountOnboarding: control field behavior and disable "Skip" on steps

[petit-aigle]

📝 Description:

Hello,

We are using the ConnectAccountOnboarding component in our application and would love to have more control over the user experience, especially in the following areas:

---

✅ Requested Features

1. Field-level control

We'd like to be able to configure certain behaviors on individual fields:

• ❗ Force specific fields to appear, even if not part of eventually_due
• 👁️ Hide fields if already prefilled
• 🔒 Make fields read-only if already prefilled (prevent users from editing them)

---

2. Disable "Skip" button

We are requesting the ability to disable the "Skip" button either:

• Globally (for the entire onboarding flow)
• Or selectively (for specific steps such as representative, company, etc.)

Currently, users can sometimes click "Skip" on steps that are essential — like identity documents or banking details. This can lead to:

• Users believing the onboarding is complete, when it’s not
• Confusion about what's missing
• KYC failure without clear feedback

---

💡 Example proposed configuration

<ConnectAccountOnboarding
  collectionOptions={{
    fields: 'eventually_due',
    futureRequirements: 'include',
    customization: {
      forceFields: ['representative.document'], // force fields to show
      readonlyIfPrefilled: ['email'],
      hideIfPrefilled: ['support_phone'],
      disableIgnoreForAllSteps: true, // 🔒 disable all "Skip" buttons
      disableIgnoreForSteps: ['representative', 'company'], // 🔒 or just some steps
    },
  }}
/>

---

🙏 This would help improve the reliability and clarity of the onboarding process for end users, and prevent accidental skips of critical compliance steps.

Thanks for considering this enhancement 🙌