StepProgressV2.2.1

• Configuration Update: Modified analysis_options.yaml to ignore the trailing commas rule.
• Code Formatting: Applied dart format . to ensure consistent code style.
• Enhanced Customization: Introduced lineLabelAlignment property in the theme for better positioning of lineLabels.
• New Feature: Added the reversed option to allow users to change the order of steps.
• Improved Labeling: Enabled display of title and subtitles relative to line segments.
• Code Simplification: Removed nodeActiveIconBuilder in favor of using nodeIconBuilder to reduce redundancy.
• Renaming: Renamed stepLabelAlignment theme property to nodeLabelAlignment.
• New Builders: Added nodeLabelBuilder and lineLabelBuilder to create customized labels.
• Bug Fixes:
  • Corrected vertical misalignment of lines and nodes.
  • Resolved rendering issue when lineThickness exceeds stepSize.
• Documentation: Updated README.md with additional examples showcasing lineLabels.
• Testing: Added new tests and updated existing ones, increasing code coverage to 96%.