This sends a request to the API endpoint for emojis and builds Markdown files for emojis.
To prevent rendering every emoji all at once, emojis are collected by their first letter
(all emojis that start with "a" are in a.md, emojis that start with "b" are in b.md,
etc.). If you really want render all emojis at once, you can view all.md.
It will also attempt to categorize emojis. See the categories. The categories are a work in progress, and contributions are welcome!
Emojis are refreshed monthly via a workflow.