[Extractor Request] Add extractor for the "streamsito" auto-embed server for Spanish-language sources

[Cotito27]

Please add extractor for the "streamsito" auto-embed server, which provides Spanish-language video sources. The server requires scraping video links following the formats below:

For movies:
https://streamsito.com/video/{IMDB_ID}/
where {IMDB_ID} is the movie's ID from IMDB.

For TV show episodes:
https://streamsito.com/video/{IMDB_ID}-{SEASON_NUMBER}x{EPISODE_NUMBER}/
where:

{IMDB_ID} is the TV show ID from IMDB.
{SEASON_NUMBER} is the season number.
{EPISODE_NUMBER} is the episode number.