Correct JSON typing and support

[reweeden]

Our type annotations and 'basic' querying functionality were assuming that parsed JSON documents would always start with a top level dict. This updates the annotations to allow any valid JSON document including ones that have a top level list or are simply a single primitive value. I also implemented a basic [] syntax to support list indexing when jsonpath_ng is not installed.

Pull Request Checklist

I have:

• performed a self review of my code I&A code style
  • Resources and Data Structures are sorted by ABC or a defined sorting pattern
• updated the documentation accordingly
• verified required action checks are passing
• bumped the version number as appropriate