Added dataset permissions

[V3lop5]

Fixes #17

This PR ...

adds permissions to datasets.

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Checklist

Checklist for Contributors

• Unit tests provided?
  Unit tests are needed for new features or to reproduce the bug solved by this PR.
• Documentation updated?
• Unit tests successful
• Code smells (flake8) checked

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[codecov-commenter]

Codecov Report

Merging #100 (9dc0fe3) into main (e0f6749) will decrease coverage by 1.91%.
The diff coverage is 60.76%.

@@            Coverage Diff             @@
##             main     #100      +/-   ##
==========================================
- Coverage   79.46%   77.55%   -1.92%     
==========================================
  Files          98      103       +5     
  Lines        2031     2223     +192     
==========================================
+ Hits         1614     1724     +110     
- Misses        417      499      +82     

Flag	Coverage Δ
pytest	77.55% <60.76%> (-1.92%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
ensysmod/api/endpoints/energy_models.py	52.63% <22.22%> (-6.56%)	⬇️
ensysmod/api/endpoints/energy_commodities.py	63.15% <28.57%> (-8.72%)	⬇️
ensysmod/api/endpoints/regions.py	63.15% <28.57%> (-8.72%)	⬇️
ensysmod/api/endpoints/datasets_permissions.py	29.09% <29.09%> (ø)
ensysmod/api/endpoints/ts_capacity_fix.py	62.50% <50.00%> (-1.95%)	⬇️
ensysmod/api/endpoints/ts_capacity_max.py	62.50% <50.00%> (-1.95%)	⬇️
ensysmod/api/endpoints/ts_operation_rate_fix.py	62.50% <50.00%> (-1.95%)	⬇️
ensysmod/api/endpoints/ts_operation_rate_max.py	62.50% <50.00%> (-1.95%)	⬇️
ensysmod/crud/dataset_permission.py	58.33% <58.33%> (ø)
ensysmod/api/permissions.py	80.00% <80.00%> (ø)
... and 15 more

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[github-actions]

Unit Test Results

  1 files  ±0    1 suites  ±0   41s ⏱️ +5s
63 tests ±0  63 ✔️ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit 9dc0fe3. ± Comparison against base commit e0f6749.