Refactor `get_anime_from_list` and improve behavior for releasing shows

[aaron-r-campbell]

Related issues

• #100
• #101

Changes made

Improved behavior for releasing shows

• episodes_total computed based on released episodes to prevent auto playing of un-aired episodes
• releasing shows now have "episode x in y days/hours/minutes" as the status
• releasing shows now display episode info as watched|released|total instead of watched|total

Refactored get_anime_from_list()

• moved graphql query to heredoc for better readability
• removed unused graphql arguments
• switched from sed to jq for API parsing
• reduced redundent calls in branching menu logic

Remaining future changes

There is still some questionable behavior in the menu branching code (lines 560-581). I chose the maximum of a 2 second delay when calling download_thumbnails but otherwise left the calls mostly the same to avoid changing other functions. However, if these functions are ever reworked, this could still be simplified further.