Add 'History of the Theravāda' content to the site

[khemarato]

This is a task to publish the History of the Theravāda folder on Google Drive as a new bibliography/tag on the site.

This includes adding all the course: theravada-roots content. For more information on how to add content from Drive to the website, see the content data entry guide.

Steps needed to accomplish this:

• [x] Add the tag as a draft to _tags/
  • Done! See the draft tag here
• [x] Add suttas from the folder to the site
• [x] Add OpenAlex academic articles in the folder to the site
• [ ] Add all other content from the public drive folder
• [ ] Add any copyrighted content (e.g. YouTube links, books, or podcasts) not shared directly in the public folder
• [ ] Add a draft set of images
• [ ] Add a description
• [ ] Add an image caption
• [ ] Audit tag content for:
  • [ ] Meeting the diversity quotas
  • [ ] Weeding content that shouldn't be included
  • [ ] Harmony of description, images, and content
• [ ] Productionize images
• [ ] Publish the tag
• [ ] Announce the tag on the blog/newsletter