Feature: TOC creation

[jakewvincent]

1. Command that will trigger a function to (a) scour the current document for headings and insert a table of contents at/under the current cursor position
2. For above, optionally scour documents linked in the current document and include those in the TOC.

[HUAHUAI23]

i'm now use https://github.com/mzlogin/vim-markdown-toc for generate TOC, but it can't make TOC for document links, i think optionally make TOC for document links is good ideal, maybe it would be better to separate the heading from the document links.
e.g :

<!--TOC-->
heading
xxxx
xxxx
xxxx
...
<!--TOC-->

<!--TOC-->
document links
xxxx
xxxx
xxxx
...
<!--TOC-->

[dna113p]

It might be nice to have a way to do more general queries across a folder full of notes. Something similar to the dataview plugin for Obsidian.