Dynamically changing tooltipBgColor

[xvrh]

This PR is to replace this one: #1348.

All credits goes to @apekshamehta

Original description:

Changes Made:

In the bar_chart_data.dart file:

Added a new parameter getTooltipColor to the constructor of BarTouchTooltipData.
Defined a new type GetBarTooltipColor, which is a function that takes a BarChartGroupData parameter and returns a Color.
In the bar_chart_painter.dart file:

Assigned the tooltip color to the _bgTouchTooltipPaint.color property using the getTooltipColor function from the tooltipData object.
Additionally, the getTooltipColor function has been utilized in the bar_chart_sample1.dart file within the feature/dynamic-tooltip-bgcolor branch.

Please review the changes for this pull request.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.52%. Comparing base (34a6af0) to head (526c16a).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1595      +/-   ##
==========================================
+ Coverage   87.51%   87.52%   +0.01%     
==========================================
  Files          45       45              
  Lines        3075     3078       +3     
==========================================
+ Hits         2691     2694       +3     
  Misses        384      384              

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[imaNNeo]

There are some minor changes. Please fix them, then It is ready to be merged!

[imaNNeo]

Thanks for your quick response and action!
I hope to see more from you xD