Title

Add optional text_alignment field to FieldContent struct with validation

Type of Change

• New feature

Description

This PR adds a new optional text_alignment field to the FieldContent struct, allowing the text in a field to be aligned to the left, center, right, or natural alignment. The supported values are "PKTextAlignmentLeft", "PKTextAlignmentCenter", "PKTextAlignmentRight", and "PKTextAlignmentNatural". Validation has been implemented to ensure that only these values are accepted. Tests have been updated to verify correct functionality.

Testing

New tests have been added to ensure that the text_alignment field accepts valid values and rejects invalid ones. Behavior when the field is omitted or set to nil has also been tested to ensure correct default handling.

Impact

This change is backward-compatible since the text_alignment field is optional. It enhances the flexibility of text presentation within the FieldContent struct.

Additional Information

N/A

Checklist

• My code adheres to the coding and style guidelines of the project.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.