- Refactored BurnPdfCommandHandler to use new extension methods for cleaner annotation handling.
- Introduced ITextStyle interface to generalize font styling for text annotations.
- Updated PDFBurnerParams to implement ITextStyle for consistent font settings reuse.
- Added MathematExtensions for coordinate and unit conversion (ToInches, ToPointF).
- Added GdPictureExtensions to encapsulate annotation-related logic (form fields, images, ink).
- Improved readability and maintainability by removing redundant helper methods.
