feat: add media entity and link documents, images and audio files to it

Dockerfile

app/Controllers/MapController.php

app/Database/Migrations/2020-05-29-120000_add_media.php

app/Database/Migrations/2020-05-30-101500_add_podcasts.php

app/Database/Migrations/2020-06-05-170000_add_episodes.php

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

app/Database/Migrations/2021-12-09-130000_add_clips.php

app/Entities/Audio.php

app/Entities/Clip.php

app/Entities/Episode.php

app/Entities/Image.php

app/Entities/ImageOLD.php

app/Entities/Media.php

app/Entities/MediaOLD.php

app/Entities/Person.php

app/Entities/Podcast.php

app/Helpers/id3_helper.php

app/Helpers/rss_helper.php

app/Helpers/seo_helper.php

app/Libraries/MediaClipper/VideoClip.php