156 add timeStyle field for passFieldContent

[njausteve]

Title

Add time_style support and validation to FieldContent struct

Type of Change

• New feature
• Refactoring

Description

This PR introduces a new time_style field to the FieldContent struct, allowing for finer control over the display of time formats. The changes include:

• Adding the time_style field to the struct with appropriate validation.
• Extending the documentation to describe valid time_style values.
• Adding test cases to verify the behavior of the time_style field.
• Refactoring date and number style validation to make the codebase more maintainable.

Testing

• Added tests to verify that time_style accepts all valid values and raises errors for invalid values.
• Ensured backward compatibility by testing cases without time_style.

Impact

The changes primarily affect how time is displayed in the FieldContent struct. No performance or security concerns are expected. The system now offers more flexibility in date-time formatting, which could enhance user experiences in scenarios that require precise time displays.

Additional Information

• Reviewers should focus on the new validation logic for time_style to ensure it aligns with the system's design for date-time formatting.
• Ensure that the documentation updates correctly describe how to use the new field.

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.

[njausteve]

closes: #163