Fix padding and margin for LineLabels and Tooltips #824

[k0psutin]

I wanted to make a PR to check with you @imaNNeo that, this PR is going on the right direction. I still need to make more testing, so a draftish PR.

This PR is for #824 and there were also discussion about adding padding/margin for the tooltips as well.

[codecov]

Codecov Report

Attention: Patch coverage is 95.09804% with 5 lines in your changes missing coverage. Please review.

Project coverage is 87.53%. Comparing base (930ac12) to head (0e8b9ad).
Report is 21 commits behind head on main.

Files	Patch %	Lines
lib/src/chart/line_chart/line_chart_painter.dart	64.28%	5 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1587   +/-   ##
=======================================
  Coverage   87.52%   87.53%           
=======================================
  Files          45       45           
  Lines        3078     3072    -6     
=======================================
- Hits         2694     2689    -5     
+ Misses        384      383    -1     

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[k0psutin]

What about these changes? There are no more margin parameters, everything is done by vertical and horizontal offsets. I had to generate mockito files again, so I could write more tests, but I have no idea why it bumped the Mockito version on the comments.

// Mocks generated by Mockito 5.4.4 from annotations

[imaNNeo]

HI, can you please resolve the conflicts?
Then I can review it

[k0psutin]

There were many conflicts, but hopefully everything is okay now. :) Not sure about the changelog format though.

[k0psutin]

Resolved conflicts again.

[imaNNeo]

Everything seems good to me.
So please resolve those two discussions, and then we can take a look again at the changelog and merge!

[imaNNeo]

Can you please rebase again?
Also, please don't update the CHANGELOG.md, because it is getting updated all the time and there will be conflicts.
Please write your proposed changelog here, I will add it to the file. Thanks!

[k0psutin]

Changelog:

* **BREAKING**  (by @k0psutin) Remove `margin` from HorizontalLineLabel and VerticalLineLabel, #824
* **BREAKING** (by @k0psutin) Remove `bottomMargin` from ScatterTooltipItem , #824
* **BREAKING**  (by @k0psutin) Remove `tooltipMargin` from HorizontalLineLabel and VerticalLineLabel, #824
* **BREAKING** (by @kopsutin) Add property `tooltipVerticalOffset` to BarTouchTooltipData, LineTouchTooltipData and ScatterTooltipItem to replace `tooltipMargin`, #824 
* **IMPROVEMENT** (by @k0psutin) Add `tooltipPadding` to BarTouchTooltipData, LineTouchTooltipData and ScatterTouchTooltipData, #824
* **IMPROVEMENT** (by @k0psutin) Add `verticalOffset` and `horizontalOffset` to HorizontalLineLabel and VerticalLineLabel to replace `margin`, #824  
* **BUGFIX**  (by @k0psutin) Fix `padding` to apply padding correctly in HorizontalLineLabel and VerticalLineLabel, #824

/// Migration guide:
/// Old way:
BarTouchTooltipData(
  tooltipMargin: -10,
)

/// New way:
BarTouchTooltipData(
  tooltipVerticalOffset: -10, // same effect as old tooltipMargin
  tooltipPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8), // Adds padding to tooltip
)

/// Migration guide:
/// Old way:
ScatterTooltipItem(
  bottomMargin: 10,
)

/// New way:
ScatterTouchTooltipData(
  tooltipVerticalOffset: 10, // same effect as old tooltipMargin
  tooltipPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8), // Adds padding to tooltip
)