Formplayer: Add progress bar

[r0ssing]

Add Dynamic Progress Bar to Formplayer Forms

User Story:

• As a user filling out forms in Formplayer
• I want to see a progress bar indicating how much of the form I’ve completed
• So that I can gauge how much is left and stay motivated to finish

Details:

• The progress bar should be dynamic, updating based on either:

  • The number of questions answered, or
  • The number of "screens" (SwipeLayout elements) completed in the JSON form.

• It should be visible at the top of the form and update in real-time as the user progresses.

Acceptance Criteria:

• Progress bar reflects the correct percentage of completion.
• Works for forms with multiple questions per screen as well as single-question screens.
• Visual styling is consistent with Formplayer’s current UI.