Add ability to parse h1 headers

[will-nemo]

This will follow basic markdown since we want to extend markdown basically. Will need to make a parser for all header tags. Will need to make everything a header after the initial delimiter, in the case of h1 will be a '#' until the end line. These headers will all be left aligned at this point with no other design

https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet