Task: Sync post data

[fennifith]

Given an author & post & possibly collection name as input:

{
  author: "crutchcorn",
  collection: "angular-internals",
  post: "angular-internals-timings",
  ref: "..."
}

• Fetch https://github.com/playfulprogramming/playfulprogramming/blob/main/content/crutchcorn/collections/angular-internals/posts/angular-internals-timings/index.md and any adjacent files in other locales (e.g. "index.es.md")
• Compare with the posts table in the database:
  • If the file exists:
    • Upload the entire markdown file to S3
    • Parse the frontmatter and insert it into the Posts table
    • If the post belongs to a collection, insert it in the CollectionChapter table
  • If the file no longer exists:
    • Remove the post from the database