add graph view (like obsidian)

[DeanLemans]

Checklist

• I have read and accepted the contributing guidelines.

Describe the solution you'd like

I would like a graph view like the one in obsidian.

A graph view is a graph that shows which page is connected to other .md file
(for implementation ideas see below

Additional context

I don't really know if this is realistic and if its not, then just close this issue.

Idea(s) for implementation:

1. An extra tab named graph.

2. Something like;
   graph-view: yes
   graph-link: yes

3. could be linked by the Tag or Categories(or idea 2)

[Aneeqasif]

it is a great feature that isnt just a cool element but serves a very important function ie discoverability. it is very reasonable and attractive method of showing connection between pages and building a knowledge graph on the website