feat: #28 replace error builder

[deandreamatias]

Connection with issue(s)

Close #28

Connected to flutter-form-builder-ecosystem/flutter_form_builder#1480

Solution description

Replace error builder for internal property of FlutterFormBuilder

Screenshots or Videos

To Do

• Read contributing guide
• Check the original issue to confirm it is fully satisfied
• Add solution description to help guide reviewers
• Add unit test to verify new or fixed behaviour
• If apply, add documentation to code properties and package readme

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 6 lines in your changes missing coverage. Please review.

Project coverage is 88.07%. Comparing base (4749d9b) to head (2046d7a).
Report is 3 commits behind head on beta.

Files with missing lines	Patch %	Lines
...ib/src/fields/form_builder_cupertino_checkbox.dart	0.00%	1 Missing ⚠️
...elds/form_builder_cupertino_segmented_control.dart	0.00%	1 Missing ⚠️
lib/src/fields/form_builder_cupertino_slider.dart	0.00%	1 Missing ⚠️
...m_builder_cupertino_sliding_segmented_control.dart	0.00%	1 Missing ⚠️
lib/src/fields/form_builder_cupertino_switch.dart	0.00%	1 Missing ⚠️
.../src/fields/form_builder_cupertino_text_field.dart	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             beta      #30   +/-   ##
=======================================
  Coverage   88.07%   88.07%           
=======================================
  Files           6        6           
  Lines         151      151           
=======================================
  Hits          133      133           
  Misses         18       18           

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