[master < E-node] Add docs for node module

[imilinovic]

Description

Add documentation for MAGE node query module.

Pull request type

Please delete options that are not relevant and check the ones that are.

• [X] New documentation page

Related PRs and issues

PR315

PR this doc page is related to: Closes (link to issue):

Checklist:

• [ ] I checked all content with Grammarly
• [ ] I performed a self-review of my code
• [ ] I made corresponding changes to the rest of the documentation
• [ ] The build passes locally
• [ ] My changes generate no new warnings or errors

[vpavicic]

@imilinovic is it ready or is it a draft?