Add markdown support

[JSAbrahams]

Is your feature request related to a problem? Please describe.
I'm not a fan of under the hood text formatting, I'd rather use markdown which can easily be copy pasted.

Describe the solution you'd like
The text editor should render markdown as it is written.
Doing this dynamically would make the application look more professional, but might be more difficult to do right as well.

Additional context
In future, we could add export functionality where we insert the references as footers using a chosen citation format.

TODO

• Add tables

[JSAbrahams]

We don't have table's yet, so not closing.