Vscode: [folding] Add code folding for markdown based on heading level

[Tyriar]

# Some heading

Collapsing `#` should collapse all lower level headings; `##`, `###`, etc.

## Another heading

Collapsing `##` should collapse all lower level headings; `###`, `####`, etc.

### Another heading

And so on...

[bpasero]

:+1:

[windsource]

+1

[darkf]

Why is this essential feature still not a thing?

[Tyriar]

@darkf because it relies on #3422 which is non-trivial and it needs to be prioritized against other work.

[sixeyes]

+1

[gmack00]

+1

[yusiwen]

+1
or adding a heading list view(TOC view) on the right side, it's really convenient for editing a large markdown file.

[iswade]

Please refer to the org-mode tab feature to implement, it's powerful.

[sejnub]

+1

[aeschli]

duplicate of #3422

[mjbvz]

Reopening to track the markdown specific work of #3422

[yzhang-gh]

I noticed that this is already implemented in the latest insider build, thanks a lot.
One more request, would you please preserve the last blank line of a folded region?
I mean

- # Heading 1

  Some text

- # Heading 1

  Another text

becomes

+ # Heading 1

+ # Heading 1

instead of

+ # Heading 1
+ # Heading 1

One reason is that currently

- # Heading 1           - # Heading 1

  ...                     ...

- ## Subheading 1  -->  + ## Subheading 1
                        - # Heading 2
  ...

- # Heading 2

[hikinthru]

Can anyone update the status on this?

[Tyriar]

@hikinthru it's coming to the next stable release.