feat: credential raw value field

[plusema86]

added a new field on the credential object saved in the database, this is needed to be able to access the original value of the credential

[codecov-commenter]

Codecov Report

Attention: 8 lines in your changes are missing coverage. Please review.

Comparison is base (24d10bb) 26.12% compared to head (611b8ea) 26.45%.

Files	Patch %	Lines
...ata/data_sources/remote_iden3comm_data_source.dart	14.28%	6 Missing ⚠️
lib/credential/data/dtos/claim_dto.dart	97.29%	1 Missing ⚠️
lib/credential/domain/entities/claim_entity.dart	50.00%	1 Missing ⚠️

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Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #371      +/-   ##
===========================================
+ Coverage    26.12%   26.45%   +0.33%     
===========================================
  Files          300      300              
  Lines         7387     7415      +28     
===========================================
+ Hits          1930     1962      +32     
+ Misses        5457     5453       -4     

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[jrl351]

Pretty straightforward.