support AsciiDoc

[aisbergde]

Is your feature request related to a problem? Please describe.

My notes system is based on AsciiDoc. Webclipper converts content into MarkDown.

I can't using the markdown content on the fly, but I need it first to save, and then I can convert into AsciiDoc using https://github.com/asciidoctor/kramdown-asciidoc However, this is a ruby program

Describe the solution you'd like

I would like to have an optional function extension that provides the content not only in Markdown, but also in AsciiDoc. For this, I see two possibilities:

• Conversion of the Markdown content (whole page, selected area, ...) created as before afterwards into AsciiDoc with the on the fly use of https://github.com/asciidoctor/kramdown-asciidoc
• Direct conversion of the HTML content into AsciiDoc

Describe alternatives you've considered.

Right now my workflow is:

1. i save the whole page in GitHub as Markdown
2. via pull I get the pages on my PC
3. now I use https://github.com/asciidoctor/kramdown-asciidoc to convert to AsciiDoc
4. from this I can copy content to other AsciiDoc files

This is especially time consuming if I only need a selected part.

[silopolis]

That, indeed, would be awesome!