Add the ability to rotate the RadarChart titles

[FlorianArnould]

Just one question :
Do we need to update the Markdown radar chart doc with more detailed information about the need behavior of the RadarChartData.getTitle field
Maybe the migration doc too

[codecov]

Codecov Report

Merging #1057 (1c479f6) into master (1430cd9) will increase coverage by 0.08%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1057      +/-   ##
==========================================
+ Coverage   86.24%   86.32%   +0.08%     
==========================================
  Files          45       45              
  Lines        2777     2808      +31     
==========================================
+ Hits         2395     2424      +29     
- Misses        382      384       +2     

Impacted Files	Coverage Δ
lib/src/chart/radar_chart/radar_chart_painter.dart	100.00% <100.00%> (ø)
...src/chart/scatter_chart/scatter_chart_painter.dart	93.67% <0.00%> (-0.91%)	⬇️
lib/src/chart/bar_chart/bar_chart_painter.dart	94.13% <0.00%> (+0.16%)	⬆️
lib/src/chart/line_chart/line_chart_painter.dart	83.58% <0.00%> (+0.22%)	⬆️

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[imaNNeo]

Everything is good and Approved.

But before merging please do the below requirements.

1. Please update the radar_chart.md doc to add RadarChartTitle section.

2. Please write about your BREAKING change in the CHANGELOG.md fil. Also, it would be great if you write a migration guide (something like what we did for 0.50.0 version here. You can name it MIGRATION_NEW_VERSION.md for now. I will rename it whenever I created our next version.

Thanks in advance!

[FlorianArnould]

Ok, I added some doc as you asked I'm not sure if it's enough or too much.
Don't hesitate if there is something else to change, add or delete 😉

[imaNNeo]

I think it's better to move your images beside the migration file. Because they are fully related to the migration file (in images/*_chart/ we put images that have a corresponding implementation in our example app).
What do you think?

[FlorianArnould]

I think it's better to move your images beside the migration file. Because they are fully related to the migration file (in images/*_chart/ we put images that have a corresponding implementation in our example app). What do you think?

Yes seems better to me to avoid flooding the example image folder. I moving all of this.

[imaNNeo]

Thank you!

[imaNNeo]

It was a straightforward PR.
It's my pleasure to see more from you in this package :)