Initial release — a premium, dependency-free Flutter charting library, a faithful port of the Compose/SwiftUI Drafter charts.

• ~27 chart types across one shared core: line, grouped line, stacked line, area, step line, simple/grouped/stacked bar, histogram, waterfall, pie, donut, radar, polar area, gauge, scatter, bubble, heatmap, funnel, bullet, box plot, treemap, sunburst, sankey, gantt, stream graph and candlestick.
• Renderer architecture: every chart is a pure ChartRenderer drawing into a Canvas, hosted by a thin widget over shared data models, axis/radial math, Catmull-Rom smooth graphics and a left-to-right reveal animation.
• DrafterTheme / DrafterThemeColors for light/dark palettes — a calm, premium color set (no harsh red).
• Built-in semantics: each chart exposes an accessibility label and value.