feat(themes): add ViewThemes library to set views in root themes folder

themes/cp_admin/podcast/list.php

themes/cp_admin/podcast/persons.php

themes/cp_admin/podcast/platforms.php

themes/cp_admin/podcast/settings/dashboard.php

themes/cp_admin/podcast/view.php

themes/cp_admin/user/create.php

themes/cp_admin/user/edit.php

themes/cp_admin/user/list.php

themes/cp_admin/user/view.php

themes/cp_app/_layout.php

themes/cp_app/credits.php

themes/cp_app/embeddable_player.php

themes/cp_app/home.php

themes/cp_app/manifest.json

themes/cp_app/page.php

themes/cp_app/podcast/_layout.php

themes/cp_app/podcast/_layout_authenticated.php

themes/cp_app/podcast/_partials/comment.php

themes/cp_app/podcast/_partials/comment_actions.php

...p_app/podcast/_partials/comment_actions_authenticated.php