Anthology history

@mjpost suggests:

Publish a history of the Anthology (based on [this thread from Steven Bird](https://x.com/StevenBird/status/1842414260208710051))

Start with the linked Steven Bird thread and the Anthology context to determine the history's scope, source material, and publication format. Done means a history of the ACL Anthology is researched, written, and published; coordinate with the existing assignee before starting.

由索引模型根据 Issue 内容生成。