[FEAT]: Visual indicator for already extracted fields and backend progress

[marcvergees]

📝 Description

Implement a visual indicator that displays the progress of field extraction during the backend process. Currently, users have no insight into which fields have already been extracted. The new visual indicator should show a real-time count and provide output reflecting the current extraction state.

💡 Rationale

Users need feedback on what the backend is doing. A progress indicator can enhance the user experience by making backend operations transparent and reassuring the user that the system is actively processing their data.

🛠️ Proposed Solution

• Add a progress bar or numeric indicator in the UI representing the number of fields extracted so far
• Display ongoing extraction output or status
• Ensure the UI is updated in real time as backend processing advances
• Integrate this feedback into the form or results area of the app

✅ Acceptance Criteria

• Visual indicator is shown while backend is extracting fields
• The indicator updates with the number of fields already extracted
• Users receive ongoing output showing extraction progress
• Works seamlessly inside Docker container
• Documentation updated in docs/
• JSON output validates against schema

📌 Additional Context

No current indication is presented to users about backend processes. This feature will provide clarity and improve user trust in FireForm's automated workflows.