WIP: Dataset in JSON-LD

[torhaugl]

Description

Add a file to describe the dataset.yaml in JSON-LD directly.
The file can be played with in JSON-LD Playground.

Type of change

• Bug fix and code cleanup
• New feature
• Documentation update
• Testing

Checklist for the reviewer

This checklist should be used as a help for the reviewer.

• Is the change limited to one issue?
• Does this PR close the issue?
• Is the code easy to read and understand?
• Do all new feature have an accompanying new test?
• Has the documentation been updated as necessary?
• Is the code properly tested?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.21%. Comparing base (f040624) to head (343029f).
Report is 14 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #276   +/-   ##
=======================================
  Coverage   78.21%   78.21%           
=======================================
  Files          20       20           
  Lines        2153     2153           
=======================================
  Hits         1684     1684           
  Misses        469      469           

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