Embedding headings respects hierarchy

[manunamz]

re:

@derekvan

- first point
    - second point
    - third point
^blockID

+1 for the tip!

I also want to add this introduces a bug. I haven’t filled out a proper bug report because I have not seen this feature advertised in the docs. But here is where I have documented it:

https://forum.obsidian.md/t/allow-subtree-or-raw-link-specification-in-embeds-and-link-preview-windows/19026/2