Feature "Added frontend user authentication access"

Indexation added based on page access via fe_group and inherited from `extendToSubpages`.

The searching is added via typoscript using the UserFunc filter:

frontendUserAccess {
    type = user
    userFunc = Codappix\SearchCore\Hook\Filter\FrontendUserAccessFilter->generate
}

To bypass this filter simply unset default filter in searching.filter