[Metadata Source Plugin] StoryGraph

[ARR8]

Scrapes metadata and covers from https://thestorygraph.com/. Metadata include:

• title
• authors
• tags (genre, mood, and pace)
• publication information
• rich-text description
• rating
• series
• ISBN
• language

It also adds a StoryGraph GUID identifier and uses it to conduct searches.

Of note to me are the tags - this website is a great resource for crowdsourced mood and pace information (in fact, the only one I've found).

There is other potential information that could be fetched, such as page counts and content warnings, but I've limited this implementation to only the major information the StoryGraph itself puts in the book info header. If there is demand for the other info, though, let me know and I'll see about scraping and adding it.

Note that edition publication information from the StoryGraph is not the most reliable; to that end, I've provided a configuration option to use the first release year of the book, instead. This is only the year, though.

[rantanplan]

This plugin probably violates term 2 of their ToS:
https://app.thestorygraph.com/terms-of-service

2. Use License
1. Permission is granted to temporarily download one copy of the materials (information or software) on The StoryGraph's website for personal, non-commercial transitory viewing only. This is the grant of a license, not a transfer of title, and under this license you may not:

1. modify or copy the materials;

2. use the materials for any commercial purpose, or for any public display (commercial or non-commercial);

3. attempt to decompile or reverse engineer any software contained on The StoryGraph's website;

4. remove any copyright or other proprietary notations from the materials; or

5. transfer the materials to another person or "mirror" the materials on any other server.

[ARR8]

That's a fair point. By my read, use in one's personal Calibre library wouldn't fall under public display, but I'll ask them. I'll update with their response once I receive it.