[Extended Markdown] Support for (a) Footnotes, (b) restart/continue order list, (c) export support to git, (d) table of contents, (e) definition list

Ideas & Features
1

Need support to the lacking other features of markdown on docs:

  1. Footnotes ( Extended Syntax | Markdown Guide )

  2. Able to restart or continue nested order list

  3. Able to export all the docs in the space (or interrelated spaces) in git (md hosting)

  4. Able to markdown-it-table-of-contents in the documents. Good for instances where we need to export where TOC should be included like pdf.

  5. Able to use definition list (Extended Syntax | Markdown Guide)