Frontmatter parser

[gerazov]

A proper frontmatter parser would be cool to set the footer text like in lookatme:

---
title: Slides Presentation
author: Me Not You
date: 2019-12-02
---

# Slide 1

Some text

[sotte]

Cross-referencing the comment from #11 (comment)

Having a frontmatter parer would be nice, but I want to keep presenting.nvim as simple as possible and don't want any external deps.

[gerazov]

We can do it in plain Lua, e.g. if the first line in the first slide starts with title: then we parse the title etc. This is just to populate the footer of course.

[neonvoidx]

I don't think just parsing for title is a valid option. i.e if front matter doesn't have title in it, it wont work.
Obsidian advanced slides plugin divides slides up by ---
unforunately front matter is also contained in

---
Frontmatter stuff
...
---

So maybe a better method would be to have a config option like remove_frontmatter: true which if true would parse out the first section from first --- to second ---