refactor organisation contributor metadata: https://github.com/metano…

[opoudjis]

…rma/metanorma-nist/issues/103

Metanorma PR checklist

• [x] Breaking changes (list related PRs) : https://github.com/metanorma/metanorma-standoc/pull/831
• [ ] Documentation update required (create task for this)
• [ ] External dependency introduced (documentation update need)
• [ ] Gem with native library introduced

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (f9a117a) 97.78% compared to head (2d8d723) 97.76%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #198 +/- ## ========================================== - Coverage 97.78% 97.76% -0.02% ========================================== Files 30 30 Lines 1490 1479 -11 ========================================== - Hits 1457 1446 -11 Misses 33 33 ```

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