v1.0.0 of zoned_line_chart

A highly customizable line chart widget for Flutter featuring colored zone backgrounds, automatic axis ticking, smooth Catmull-Rom curves, and interactive tap-to-inspect tooltips. Changelog excerpt: - Initial release. - CustomLineChartwidget with smooth Catmull-Rom line rendering. - Configurable Y-axis range, unit, and automatic "nice number" tick generation. - X-axis support for time(HH:mm), date(MM-dd), number, and stringmodes. - Colored zone backgrounds (ChartZone) for visual threshold indication. - Tap-to-inspect interaction with tooltip card showing timestamp, value, and metadata notes. - Auto-skipping of overlapping X-axis labels. - Zone legend rendered below the chart.