Cache: Fix cache content schema Windows compatibility

[tangrufus]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 49.50%. Comparing base (b915513) to head (4fc98f3).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main      #12      +/-   ##
============================================
- Coverage     50.00%   49.50%   -0.50%     
+ Complexity       62       61       -1     
============================================
  Files             8        8              
  Lines           204      202       -2     
============================================
- Hits            102      100       -2     
  Misses          102      102              

Flag	Coverage Δ
feature	22.27% <0.00%> (+0.21%)	⬆️
unit	27.22% <100.00%> (-0.72%)	⬇️

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[Copilot]

Pull Request Overview

This PR fixes Windows compatibility issues in the Cache class by replacing hardcoded Unix-style newlines (\n) with the platform-appropriate line separator constant (PHP_EOL). This ensures the cache content schema works correctly across different operating systems.

Key Changes

• Replaced \n newlines with PHP_EOL constant in cache read/write operations
• Simplified cache content parsing logic by using str_starts_with() instead of explode()
• Updated test expectations to use PHP_EOL for consistency

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
src/WpOrg/Api/Cache.php	Refactored cache read/write methods to use PHP_EOL and simplified parsing logic
tests/Unit/WpOrg/Api/CacheTest.php	Updated test mocks to use PHP_EOL in expected cache content strings

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