[BUG]: FireForm cannot fill non-text PDF fields (checkboxes, radio buttons, etc.)

[marcvergees]

⚡️ Describe the Bug

FireForm currently lacks support for filling non-text form fields in PDFs. Users cannot programmatically fill checkboxes, radio buttons, selection markers, or other non-text field types (such as gender options: male/female). This limits FireForm's capability to handle complete PDF forms that include these common form elements.

👣 Steps to Reproduce

1. Create or load a PDF with non-text form fields (checkboxes, radio buttons, etc.)
2. Attempt to map and fill these fields using FireForm's API
3. Observe that FireForm either ignores these fields or raises an error

📉 Expected Behavior

FireForm should support filling non-text form fields including:

• Checkboxes (checked/unchecked)
• Radio buttons (selected option)
• Other selectable options (gender, yes/no, dropdown selections, etc.)
• Generate PDFs with the correct selections/marks applied

🖥️ Environment Information

• OS: (Please specify: e.g. Ubuntu 22.04, MacOS, Windows)
• FireForm Version: (Please specify the version)
• PDF Type: (Describe the form type or attach sample)

📸 Screenshots/Logs

(Optional) If applicable, attach a sample PDF file or screenshot showing the unsupported field types.

🕵️ Possible Fix

Extend FireForm's field handling logic to:

• Detect and map non-text field types in PDF forms
• Implement field-type-specific filling logic for checkboxes, radio buttons, etc.
• Update API documentation to clarify support for these field types
• Add validation to ensure non-text fields are correctly populated

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This enhancement would greatly expand FireForm's capability for automating forms that include common non-text field types.