Create arXiv integrations

[emilyhunt]

The rough plan is as follows:

1. There will be code that uses the arXiv API to gather papers from each day's postings on astro-ph.

2. Per-subcategory bots will post each paper for the day in a thread. The rough scope of a post will be:

• Post text is the title of the paper + author list + link
• Try and grab images from the paper -> maybe there's a way to look for a "results" section in a paper and pick figures from there? Or... gather some at random?
• Also include an image which is a screenshot (or just somehow an auto-generated picture?) of the abstract. Text should be in the alt text too. Since arXiv's design is pretty plain, it may be possible to replicate something with e.g. matplotlib (bit hacky but should work) or some other library.

3. Additional ideas:

• Feed integrations: the OP post of each day's thread of posts could be posted into relevant feeds.
• astro-ph feed: I could make a feed that includes all posts by all of the bots? (may not be possible due to how replies are rendered)
• Keywords: if there's a way to extract keywords / word clouds from the paper, then they could be used somehow. Maybe combined with the abstract-screenshot image?
• Possible advanced recommendation integrations: could track likes by users, and then create an "astro-ph For You" feed? (again, reply rendering may be an issue here...)

[emilyhunt]

This Python arXiv API implementation might be helpful: https://github.com/lukasschwab/arxiv.py