Add optional minimumVarianceUnit to GetTimeAgo.parse for custom stopping points

[josephtaylor-mn]

Pull Request Checklist

What does this PR do?

This PR introduces an optional minimumVarianceUnit parameter to the GetTimeAgo.parse method, allowing users to specify a unit (seconds, minutes, hours, days) to act as a threshold. When the elapsed time is less than this threshold, the method returns “Less than [Unit]”. If the elapsed time is less than 15 seconds, it always returns “Just now”. If the parameter is not provided, the method retains its original behavior.

Checklist

Code Changes

• I have added new features to the package (e.g., custom time thresholds, new languages, etc.)
• I have fixed existing issues (e.g., incorrect formatting, performance bottlenecks)
• I have improved the overall structure or optimized the codebase

Documentation

• I have updated the README file or relevant documentation with the changes
• I have added code usage examples or updated existing examples to reflect changes
• I have updated the package version in the pubspec.yaml file

Testing

General Tests

• The package correctly formats time differences into human-readable strings
• The package supports dynamic updates (e.g., changing locales, thresholds)

Localization

• The package supports all documented languages
• Custom locales can be added and work as expected
• Language fallback works correctly if a specific locale is missing

Custom Thresholds

• Custom time thresholds are applied correctly
• The package handles edge cases like just now, future dates, or extreme past dates

Error Handling

• The package handles null or invalid inputs gracefully
• Fallback behavior works for unexpected or incorrect configurations

Responsiveness

• The package adapts to time-zone differences accurately
• The formatting responds correctly to locale changes in the app

Performance

• The package performs efficiently, even when processing frequent or large updates
• Performance tests show no regressions

How did you verify your code works?

I ran manual tests to verify time formatting for different locales and thresholds

[nixrajput]

Hi @josephtaylor-mn,

Thank you for contributing to the project.
Please write test cases or make changes to existing test cases before I merge this branch.

Regards,
Nikhil

[nixrajput]

Please fix the errors occurring during workflows too.

Thanks