feat(#65): add prefix, add setLoggerPrefix, update documentation - closes #65

[francescovallone]

Description

Add the possibility to change the Serinus prefix in the logger to allow a more personalized experience in logging.

Fixes #65

Type of change

Please delete options that are not relevant.

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[codecov]

Codecov Report

Attention: Patch coverage is 90.24390% with 4 lines in your changes missing coverage. Please review.

Project coverage is 90.00%. Comparing base (4158de8) to head (0659309).
Report is 3 commits behind head on develop.

Files with missing lines	Patch %	Lines
...kages/serinus/lib/src/services/logger_service.dart	20.00%	4 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop      #91      +/-   ##
===========================================
+ Coverage    89.89%   90.00%   +0.10%     
===========================================
  Files           74       75       +1     
  Lines         2643     2680      +37     
===========================================
+ Hits          2376     2412      +36     
- Misses         267      268       +1     

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