Fix translated pricing links, directory attributes, and Divi search routes

[RabbiIslamRony]

Ticket

• Help Scout conversation #3432525836

Description

• Resolve Directorist's Add Listing page through WPML before returning pricing-plan action URLs.
• Preserve existing plan, listing_type, and other query arguments when switching to the translated Add Listing page.
• Normalize nested directory attributes and term objects before converting directory IDs, preventing Array to string conversion warnings in the WPML admin flow.
• Keep the Divi Homepage Search form on the translated Directorist Search Result route for non-default languages.
• Leave the default-language Divi search route unchanged.
• Add focused regression coverage and prepare the 2.2.4 version/changelog metadata.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change

How has this been tested?

• Ran PHP syntax checks across app, helper, and tests.
• Ran every repository tests/*_Test.php regression script successfully.
• Added a permalink regression test covering the translated Add Listing path and preservation of Directorist's plan and listing_type query arguments.
• Added nested-array, term-object, and empty nested directory ID regression assertions.
• Added Divi route assertions covering a translated English result page and the unchanged Spanish default-language route.
• Ran git diff --check successfully.
• Verified the combined Divi + WPML behavior resolves the English target to https://esteponeros.com/en/estepona-directory/estepona-businesses/?directorist_home_search=1.

PHP 8.5 reports the repository's existing Reflection::setAccessible() deprecation notices in several test files; all test scripts still pass.

Screenshots

Pricing-plan continuation URL

• Before: https://prnt.sc/htzyAJUuhTSo
• After: https://prnt.sc/dkwujcMjCk48

Divi Homepage Search translated route

Before: English search loses its language route	After: English search keeps the translated Directorist route

Related work

• Companion Divi Integration PR: https://github.com/sovware/directorist-divi-integration/pull/120

Checklist

• My code is tested
• I've included necessary tests
• I've included developer/release documentation where applicable
• I've added proper labels to this pull request