Link to Github edit page of the current documentation view

[Kian-Esmaeilpour]

Is your feature request related to a problem? Please describe.
It's hard for most of people (mostly non-engineers) to find the right place when they want to contribute to the documentation

Describe the solution you'd like
The simplest solution for now is to have a link to the related page on Github repo, in edit mode. Maybe somewhere underneath of note for github issue on the right

Additional context
Since we are going to have completely separate documentation for elements (and design principle?) then it doesn't make sense to spend too much time and effort on fixing this issue in Tradeshift-ui documentation, but definitely one of the main things that need to be considered for choosing the tool and the way that we want to document the Elements