feat: GOFF Specificity

[thomaspoignant]

Description

• add test provider name
• Support flagMetadata
• Manage the flag data collection

Fixes #6

Checklist

• I have tested this code
• I have added unit test to cover this code
• I have followed the contributing guide

[codecov]

Codecov Report

Attention: Patch coverage is 80.43912% with 98 lines in your changes missing coverage. Please review.

Project coverage is 84.27%. Comparing base (73c79df) to head (e73f84b).

Files	Patch %	Lines
Sources/GOFeatureFlag/model/feature_event.swift	0.00%	44 Missing ⚠️
Sources/OFREP/model/bulk_evaluation_response.swift	72.72%	12 Missing ⚠️
Sources/OFREP/ofrep.swift	83.78%	6 Missing ⚠️
Sources/GOFeatureFlag/model/value_extension.swift	72.22%	5 Missing ⚠️
.../GOFeatureFlag/hook/data_collector_bool_hook.swift	90.90%	4 Missing ⚠️
...OFeatureFlag/hook/data_collector_double_hook.swift	90.90%	4 Missing ⚠️
...FeatureFlag/hook/data_collector_integer_hook.swift	90.90%	4 Missing ⚠️
...OFeatureFlag/hook/data_collector_object_hook.swift	91.30%	4 Missing ⚠️
...OFeatureFlag/hook/data_collector_string_hook.swift	90.90%	4 Missing ⚠️
Sources/GOFeatureFlag/provider.swift	91.48%	4 Missing ⚠️
... and 4 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #11      +/-   ##
==========================================
+ Coverage   76.95%   84.27%   +7.31%     
==========================================
  Files           9       22      +13     
  Lines         421      865     +444     
==========================================
+ Hits          324      729     +405     
- Misses         97      136      +39     

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