title	issue
Add theme config inheritance	NEXT-17637

Administration

Added currentThemeConfig prop to /src/modules/sw-theme-manager/page/sw-theme-manager-detail/index.js to hold the configuration of the current theme without the inheritances.
Added sw-inherit-wrapper to all config fields in src/modules/sw-theme-manager/page/sw-theme-manager-detail/sw-theme-manager-detail.html.twig.
Changed snippet for sw-theme-manager.detail.inheritanceInfo.

Storefront

Added configInheritance property to src/Storefront/Theme/StorefrontPluginConfiguration/StorefrontPluginConfiguration.php
Changed \Shopware\Storefront\Theme\ThemeLifecycleService::refreshTheme to add the parentId to a new activated theme if the configInheritance configuration is set in the theme.json.
Changed \Shopware\Storefront\Theme\ThemeService::getThemeConfiguration by adding two new keys to the return array
- currentFields holding only the values configured in the current theme. Not configured fields are set to null.
- baseThemeFields holding only the values configured in parent themes. Not configured fields are set to null.