refactor(tests): restructure test directories to mirror source paths

[JohnVillalovos]

Summary

Test files do not consistently mirror the directory structure of the source files they test. For example, tests for lib/Application/Admin/ live in tests/Application/Admin/ (dropping the lib/ prefix), while tests for Presenters/Admin/ live in tests/Presenters/Admin/ (exact mirror).

This inconsistency makes it harder to locate the test file for a given source file.

Proposed change

Restructure the tests/ directory so that test file paths exactly mirror their source file paths. For example:

• lib/Application/Admin/ResourcePermissionService.php → tests/lib/Application/Admin/ResourcePermissionServiceTest.php
• lib/Application/Authentication/LdapAuthentication.php → tests/lib/Application/Authentication/LdapAuthenticationTest.php

Notes

• phpunit.xml.dist test suite directories will need to be updated to include the new paths (e.g. add ./tests/lib/Application to the application suite)
• This should be done as a single batch move to avoid partial inconsistency
• Consider updating CLAUDE.md test naming conventions to reflect the new structure