build(i18n): include Breton and Serbian (Latin) languages to Castopod bundle

app/Config/App.php

app/Language/.rsync-filter

app/Language/sr-Latn/Comment.php

app/Language/sr-Latn/Common.php

app/Language/sr-Latn/Episode.php

app/Language/sr-Latn/Fediverse.php

app/Language/sr-Latn/Home.php

app/Language/sr-Latn/Page.php

app/Language/sr-Latn/Podcast.php

app/Language/sr-Latn/Post.php

modules/Admin/Language/.rsync-filter

modules/Admin/Language/sr-Latn/AboutCastopod.php

modules/Admin/Language/sr-Latn/Breadcrumb.php

modules/Admin/Language/sr-Latn/Charts.php

modules/Admin/Language/sr-Latn/Common.php

modules/Admin/Language/sr-Latn/Countries.php

modules/Admin/Language/sr-Latn/Dashboard.php

modules/Admin/Language/sr-Latn/Episode.php

modules/Admin/Language/sr-Latn/EpisodeNavigation.php

modules/Admin/Language/sr-Latn/Fediverse.php