v3.0.0 of candlesticks

A high-performance, interactive Flutter candlestick chart for financial apps. Changelog excerpt: - [Breaking] Remove the actionsparameter from Candlesticks. Consumers should now provide toolbar/actions UI outside the widget. - [Feature] add [CandlesticksController] for external chart control - [Feature] add logarithmic scale support - [Feature] add custom chart styling with [CandleSticksStyle] - [Feature] add customizable [loadingWidget] - [Feature] Add anchored zoom with Ctrl/Command+ scroll. On web, use Alt/Option+ scroll. - [Feature] add free chart dragging[...]