fix(test): rename transformers test file to match test runner glob

[wilsonwangdev]

Description

The test file at src/generators/metadata/utils/__tests__/transformers.mjs was never picked up by the test runner because the glob pattern in package.json is "src/**/*.test.mjs". This file contains 8 tests for transformTypeToReferenceLink that have never executed in CI.

This PR simply renames it to transformers.test.mjs so the tests are included in test runs.

Validation

After renaming, ran the file directly to confirm all 8 tests pass:

▶ transformTypeToReferenceLink
  ✔ should transform a JavaScript primitive type into a Markdown link
  ✔ should transform a JavaScript global type into a Markdown link
  ✔ should transform a type into a Markdown link
  ✔ should transform a basic Generic type into a Markdown link
  ✔ should partially transform a Generic type if only one part is known
  ✔ should transform a Generic type with an inner union like {Promise<string|boolean>}
  ✔ should transform multi-parameter generics like {Map<string, number>}
  ✔ should handle outer unions with generics like {Promise<string|number> | boolean}
✔ transformTypeToReferenceLink
ℹ tests 8 | pass 8 | fail 0

Check List

• I have read the Contributing Guidelines and made commit messages that follow the guideline.
• I have run node --run test and all tests passed.
• I have check code formatting with node --run format & node --run lint.
• I've covered new added functionality with unit tests if necessary.

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Project	Deployment	Actions	Updated (UTC)
api-docs-tooling	Ready	Preview	Mar 26, 2026 2:27pm

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.33%. Comparing base (d121f54) to head (d19d15b).
⚠️ Report is 6 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #717      +/-   ##
==========================================
+ Coverage   75.40%   76.33%   +0.92%     
==========================================
  Files         148      148              
  Lines       13586    13586              
  Branches     1025     1052      +27     
==========================================
+ Hits        10245    10371     +126     
+ Misses       3336     3210     -126     
  Partials        5        5              

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