feat: show readable message for HTML error responses

[katerina20]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 80.95238% with 12 lines in your changes missing coverage. Please review.
✅ Project coverage is 65.71%. Comparing base (f7534dc) to head (b97a5b0).
⚠️ Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
...com/crowdin/cli/client/CrowdinJsonTransformer.java	82.36%	2 Missing and 7 partials ⚠️
...java/com/crowdin/cli/client/CrowdinClientCore.java	72.73%	0 Missing and 3 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1038      +/-   ##
============================================
+ Coverage     65.51%   65.71%   +0.20%     
- Complexity     1796     1820      +24     
============================================
  Files           255      256       +1     
  Lines          7363     7429      +66     
  Branches       1120     1129       +9     
============================================
+ Hits           4823     4881      +58     
- Misses         1899     1900       +1     
- Partials        641      648       +7     

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[Copilot]

Pull request overview

This PR improves the CLI’s error reporting when the Crowdin API client receives an unexpected HTML response (common with proxies/gateways), ensuring users see a readable message rather than a JSON parse error.

Changes:

• Introduces CrowdinJsonTransformer to detect HTML bodies and convert them into a readable HttpException.
• Formats HTML error responses in CrowdinClientCore with a dedicated, user-friendly message (including extracted body text).
• Adds unit tests to validate HTML detection/extraction and readable error messages.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/main/java/com/crowdin/cli/client/CrowdinJsonTransformer.java	Adds a delegating JSON transformer that detects HTML and builds a readable HttpException.
src/main/java/com/crowdin/cli/client/Clients.java	Switches client configuration to use CrowdinJsonTransformer instead of raw JacksonJsonTransformer.
src/main/java/com/crowdin/cli/client/CrowdinClientCore.java	Detects HTML responses in HttpException and formats a clearer error message for users.
src/main/resources/messages/messages.properties	Adds a localized message explaining why an HTML response might occur.
src/test/java/com/crowdin/cli/client/CrowdinJsonTransformerTest.java	Adds targeted unit tests for HTML parsing/detection behavior and delegation to Jackson.
src/test/java/com/crowdin/cli/client/CrowdinProjectClientTest.java	Adds an integration-style test ensuring the final thrown message is readable for HTML responses.

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