feat: update API domain configuration

[geeksman]

Note

Introduce apiDomain in credentials and use it to construct REST/GraphQL endpoints; mark baseUrl as deprecated.

• Core (src/core/index.ts):
  • Credentials:
    • Add apiDomain (e.g., api.crowdin.com).
    • Deprecate baseUrl (doc-only deprecation note).
  • CrowdinApi:
    • Introduce apiDomain instance field; default to api.crowdin.com via CROWDIN_API_DOMAIN.
    • Build REST base URL with https://<organization?.>${apiDomain}/api/v2.
    • Build GraphQL URL with https://<organization?.>${apiDomain}/api/graphql.
    • Replace CROWDIN_URL_SUFFIX with CROWDIN_API_DOMAIN constant.

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[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 89.91%. Comparing base (5c309fb) to head (e2d50ae).

Files with missing lines	Patch %	Lines
src/core/index.ts	50.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #593      +/-   ##
==========================================
+ Coverage   89.90%   89.91%   +0.01%     
==========================================
  Files          40       40              
  Lines        2029     2030       +1     
  Branches      214      215       +1     
==========================================
+ Hits         1824     1825       +1     
  Misses         82       82              
  Partials      123      123              

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