fix: export multipart and file-like params as FILE type

[tangcent]

Summary

• map MultipartFile and additional file-like Java/Spring/Servlet types to FILE
• ensure special file marker is treated as file type
• add/export tests for model attribute and direct MultipartFile parameters

Testing

• not run locally

[github-actions]

📦 Plugin has been packaged for this PR. You can download easy-api-3.0.3.252.0.zip from the GitHub Actions workflow run by clicking on the "Artifacts" dropdown.

[github-actions]

📦 Plugin has been packaged for this PR. You can download easy-api-3.0.3.252.0.zip from the GitHub Actions workflow run by clicking on the "Artifacts" dropdown.

[codecov]

Codecov Report

❌ Patch coverage is 46.66667% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 53.543%. Comparing base (27bd59f) to head (6bb17ae).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...com/itangcent/easyapi/psi/DefaultPsiClassHelper.kt	0.000%	6 Missing ⚠️
.../kotlin/com/itangcent/easyapi/psi/type/JsonType.kt	75.000%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@               Coverage Diff               @@
##              master      #648       +/-   ##
===============================================
+ Coverage     53.492%   53.543%   +0.051%     
- Complexity      2332      2347       +15     
===============================================
  Files            228       228               
  Lines          13273     13281        +8     
  Branches        2991      2998        +7     
===============================================
+ Hits            7100      7111       +11     
- Misses          4856      4857        +1     
+ Partials        1317      1313        -4     

Flag	Coverage Δ
unittests	53.543% <46.667%> (+0.051%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
...m/itangcent/easyapi/psi/type/SpecialTypeHandler.kt	81.818% <100.000%> (ø)
.../kotlin/com/itangcent/easyapi/psi/type/JsonType.kt	45.238% <75.000%> (+2.930%)	⬆️
...com/itangcent/easyapi/psi/DefaultPsiClassHelper.kt	52.826% <0.000%> (-0.231%)	⬇️

... and 3 files with indirect coverage changes

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