Add --pretty-print flag to make-php command

[Copilot]

The make-php command currently generates single-line minified PHP files, making them impractical to work with when replacing PO/MO files with PHP translations.

Changes

• MakePhpCommand: Added --pretty-print flag that passes formatting option to PhpArrayGenerator
• PhpArrayGenerator: Enhanced var_export() to support formatted output with proper indentation, newlines, and spacing when prettyPrint option is enabled
• Tests: Added Behat scenario validating pretty-print functionality

Usage

# Default behavior (unchanged)
$ wp i18n make-php example-plugin-de_DE.po
# Creates: ['domain'=>'foo','messages'=>[...]]

# With pretty-print
$ wp i18n make-php example-plugin-de_DE.po --pretty-print
# Creates:
# [
#     'domain' => 'foo',
#     'messages' => [
#         'Hello' => 'Hallo',
#     ],
# ]

Both formats produce identical arrays when loaded. Follows the existing pattern from make-json --pretty-print.

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If you need me to access, download, or install something from one of these locations, you can either:

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Original prompt

---

This section details on the original issue you should resolve

<issue_title>make-php - Make output file content pretty</issue_title>
<issue_description>## Feature Request

• Yes, I reviewed the contribution guidelines.

Describe your use case and the problem you are facing

When we do wp i18n make-php it creates PHP files containing one line, like minified PHP, but If we want to delete the old .po/.mo files to work with only PHP translations, working one line generated files is not practical

Describe the solution you'd like

Formatted output will look better

</issue_description>

<agent_instructions>Add a new --pretty-print arg for the make-php command</agent_instructions>

Comments on the Issue (you are @copilot in this section)

@swissspidy We can add a `pretty-print` option like we have for make-json. Wanna help put a PR together? :)

• Fixes make-php - Make output file content pretty #395

---

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[codecov]

Codecov Report

❌ Patch coverage is 94.73684% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/PhpArrayGenerator.php	93.75%	1 Missing ⚠️

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