Support for JSON/XML/YAML/etc. codeblock fences

[brianrodri]

Thanks for the great plugin!

I think it'd be amazing to support jsonfly for inline JSON/XML/YAML/etc. files.

For my specific use-case, I'm hoping to edit the frontmatter of my markdown notes:

---
creation-date: XXX
tags: YYY
???: ZZZ
---

# H1

Blah blah...

When my cursor is within those first 5 lines, I'd like to be able to call :Telescope jsonfly "URI to Schema File" to bring up the same telescope picker as usual.

What do you think?