feat(person): add podcastindex.org namespace person tag

.gitignore

app/Config/Routes.php

app/Controllers/Admin/EpisodePerson.php

app/Controllers/Admin/Person.php

app/Controllers/Admin/PodcastImport.php

app/Controllers/Admin/PodcastPerson.php

app/Controllers/Episode.php

app/Controllers/Page.php

app/Controllers/Podcast.php

app/Database/Migrations/2020-06-05-190000_add_platforms.php

...e/Migrations/2020-06-08-160000_add_podcasts_platforms.php

app/Database/Migrations/2020-12-25-120000_add_persons.php

...ase/Migrations/2020-12-25-130000_add_podcasts_persons.php

...ase/Migrations/2020-12-25-140000_add_episodes_persons.php

...Database/Migrations/2020-12-25-150000_add_credit_view.php

app/Database/Seeds/AuthSeeder.php

app/Database/Seeds/PlatformSeeder.php

app/Entities/Credit.php

app/Entities/Episode.php

app/Entities/EpisodePerson.php