Markdown and RST file ambiguity

[alitariq4589]

@jjscheel There is one issue that I noticed in using markdown with Sphinx.

Right now there is no subchapter in the index on the left bar. But as we proceed, we will need that in our docs. Each subsection requires its own toctree (table of contents tree) unlike mkdocs. But as far as I have seen in the documentation and forms, sphinx only supports toctrees in .rst files. So, as we move forward, we will run into confusion with using markdown files with normal pages and using rst files with pages that require sub-chapters. I suggest we completely move towards .rst to avoid any confusion.

P.S. If there was a specific reason you used markdown instead of rst, please mention

[alitariq4589]

PR #4 Should solve this issue