feat(rest-api): add endpoints for episodes and full text search for podcasts and episodes

.env.example

...ations/2023-06-12-010000_add_full_text_search_indexes.php

app/Database/Seeds/FakeSinglePodcastApiSeeder.php

app/Models/EpisodeModel.php

app/Models/PodcastModel.php

modules/Admin/Controllers/EpisodeController.php

modules/Api/Rest/V1/Config/RestApi.php

modules/Api/Rest/V1/Config/Routes.php

modules/Api/Rest/V1/Controllers/EpisodeController.php

modules/Api/Rest/V1/Controllers/PodcastController.php

modules/Api/Rest/V1/Filters/ApiFilter.php

tests/modules/Api/Rest/V1/EpisodeTest.php