Initialize modulesDB and update xdebug.ini

[blackcoder87]

Description

• Initialize modulesDB
• Update xdebug.ini

https://xdebug.org/docs/upgrade_guide

PHP Warning:  Undefined variable $modulesDB in application/modules/admin/mappers/Module.php on line 73

PHP Fatal error:  Uncaught TypeError: array_diff(): Argument #2 must be of type array, null given in application/modules/admin/mappers/Module.php:73
Stack trace:
#0 application/modules/admin/mappers/Module.php(73): array_diff()
#1 application/modules/admin/mappers/Module.php(196): Modules\Admin\Mappers\Module->getModulesNotInstalled()
#2 application/modules/admin/controllers/admin/Index.php(59): Modules\Admin\Mappers\Module->getVersionsOfModules()
#3 application/libraries/Ilch/Page.php(243): Modules\Admin\Controllers\Admin\Index->indexAction()
#4 application/libraries/Ilch/Page.php(137): Ilch\Page->loadController()
#5 index.php(68): Ilch\Page->loadPage()
#6 {main}
  thrown in application/modules/admin/mappers/Module.php on line 73

Type of change

• Bug fix (non-breaking change which fixes an issue)

This PR has been tested in the following browsers:

• Chrome
• Firefox
• Opera
• Edge