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

[opoudjis]

…rma/metanorma-nist/issues/103

Metanorma PR checklist

• Breaking changes (list related PRs) : logo attributes, organisation attributes overhaul: https://github.com… metanorma-standoc#831
• Documentation update required (create task for this)
• External dependency introduced (documentation update need)
• Gem with native library introduced

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (7a94679) 96.96% compared to head (d577546) 96.94%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #311      +/-   ##
==========================================
- Coverage   96.96%   96.94%   -0.03%     
==========================================
  Files          37       37              
  Lines        2045     2029      -16     
==========================================
- Hits         1983     1967      -16     
  Misses         62       62              

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