feat: Support JSON logic rules

[thomaspoignant]

Description

This PR adds support of JSONLogic type of rules in your configuration.

Closes issue(s)

Resolve #

Checklist

• I have tested this code
• I have added unit test to cover this code
• I have updated the documentation (README.md and /website/docs)
• I have followed the contributing guide

[netlify]

✅ Deploy Preview for go-feature-flag-doc-preview canceled.

Name	Link
🔨 Latest commit	a9fa4eb
🔍 Latest deploy log	https://app.netlify.com/sites/go-feature-flag-doc-preview/deploys/676b1ee144e2bf0008d1d4b3

[codecov]

Codecov Report

Attention: Patch coverage is 54.16667% with 22 lines in your changes missing coverage. Please review.

Project coverage is 84.47%. Comparing base (7d94c06) to head (a9fa4eb).

Files with missing lines	Patch %	Lines
internal/flag/rule.go	43.58%	21 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2863      +/-   ##
==========================================
- Coverage   84.79%   84.47%   -0.32%     
==========================================
  Files         111      113       +2     
  Lines        5195     5237      +42     
==========================================
+ Hits         4405     4424      +19     
- Misses        625      647      +22     
- Partials      165      166       +1     

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud