refactor: add modules folder to phpstan paths + fix errors

app/Common.php

app/Config/Fediverse.php

app/Controllers/ActorController.php

app/Controllers/ColorsController.php

app/Controllers/EpisodeCommentController.php

app/Controllers/EpisodeController.php

app/Controllers/HomeController.php

app/Controllers/PodcastController.php

app/Controllers/PostController.php

app/Entities/Episode.php

app/Entities/Person.php

app/Entities/Podcast.php

app/Helpers/misc_helper.php

app/Helpers/page_helper.php

app/Helpers/seo_helper.php

app/Libraries/Router.php

app/Models/PodcastModel.php

app/Models/PostModel.php

composer.json

composer.lock