Add models for dataset and energy-model

[V3lop5]

Fixes #16

This PR ...

• adds dataset models according to Add models for dataset and (FINE-)model #16
• adds model for region, time series and conversion parameters
• adds energy-model models according to Add models for dataset and (FINE-)model #16
• adds unit tests for everything
• adds documentation for all models

---

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 successfull
• Code smells (flake8) checked

Checklist for Reviewers

• Read PR description
• Check linked issue
• Check CI/CD (build, automated tests, linting, preview build)
• Check documentation changes
• Add labels to PR

[codecov-commenter]

Codecov Report

Merging #18 (46139b1) into main (7aa982b) will increase coverage by 1.81%.
The diff coverage is 88.66%.

@@            Coverage Diff             @@
##             main      #18      +/-   ##
==========================================
+ Coverage   88.55%   90.37%   +1.81%     
==========================================
  Files          46       72      +26     
  Lines         568     1153     +585     
==========================================
+ Hits          503     1042     +539     
- Misses         65      111      +46     

Flag	Coverage Δ
pytest	90.37% <88.66%> (+1.81%)	⬆️

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

Impacted Files	Coverage Δ
ensysmod/api/endpoints/ts_capacity_max.py	63.82% <63.82%> (ø)
ensysmod/api/endpoints/ts_operation_rate_fix.py	63.82% <63.82%> (ø)
ensysmod/api/endpoints/ts_operation_rate_max.py	63.82% <63.82%> (ø)
ensysmod/api/endpoints/energy_commodities.py	71.87% <71.87%> (ø)
ensysmod/api/endpoints/regions.py	71.87% <71.87%> (ø)
ensysmod/app.py	92.85% <80.00%> (-7.15%)	⬇️
ensysmod/crud/region.py	90.90% <80.00%> (+2.02%)	⬆️
ensysmod/crud/energy_sink.py	88.00% <83.33%> (-0.89%)	⬇️
ensysmod/crud/energy_source.py	88.00% <83.33%> (-0.89%)	⬇️
ensysmod/crud/user.py	95.00% <83.33%> (-5.00%)	⬇️
... and 50 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 7aa982b...46139b1. Read the comment docs.

[github-actions]

Unit Test Results

  1 files  ±  0    1 suites  ±0   17s ⏱️ +13s
55 tests +35  55 ✔️ +35  0 💤 ±0  0 ❌ ±0 

Results for commit 619f221. ± Comparison against base commit 7aa982b.

This pull request removes 7 and adds 42 tests. Note that renamed tests count towards both.

tests.crud.test_energy_conversion ‑ test_create_energy_conversion
tests.database.test_tables ‑ test_table_consumption
tests.database.test_tables ‑ test_table_energyconversion
tests.database.test_tables ‑ test_table_energysink
tests.database.test_tables ‑ test_table_energysource
tests.database.test_tables ‑ test_table_energystorage
tests.database.test_tables ‑ test_table_generation

tests.api.test_datasets ‑ test_create_dataset
tests.api.test_datasets ‑ test_create_existing_dataset
tests.api.test_datasets ‑ test_delete_existing_dataset
tests.api.test_datasets ‑ test_update_existing_dataset
tests.api.test_energy_commodities ‑ test_create_energy_commodity
tests.api.test_energy_commodities ‑ test_create_energy_commodity_unknown_dataset
tests.api.test_energy_commodities ‑ test_create_existing_energy_commodity
tests.api.test_energy_conversions ‑ test_create_energy_conversion
tests.api.test_energy_conversions ‑ test_create_energy_conversion_unknown_commodity
tests.api.test_energy_conversions ‑ test_create_energy_conversion_unknown_dataset
…