feat: string-based API support

[innomaxx]

Closes #143

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 95.59748% with 7 lines in your changes missing coverage. Please review.

Project coverage is 99.31%. Comparing base (679711b) to head (e90a5ad).

Files with missing lines	Patch %	Lines
crowdin_api/api_resources/branches/resource.py	85.37%	6 Missing ⚠️
crowdin_api/api_resources/clients/resource.py	80.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #204      +/-   ##
==========================================
- Coverage   99.39%   99.31%   -0.08%     
==========================================
  Files         170      177       +7     
  Lines        7313     7471     +158     
  Branches      170      173       +3     
==========================================
+ Hits         7268     7419     +151     
- Misses         30       37       +7     
  Partials       15       15              

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