Added zip download

[V3lop5]

Fixes #59

This PR ...

adds the ability to download a dataset.

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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

Checklist for Reviewers

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• Check CI/CD (build, automated tests, linting, preview build)
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[codecov-commenter]

Codecov Report

Merging #74 (e1dd40d) into main (0ea55ad) will decrease coverage by 7.49%.
The diff coverage is 27.40%.

@@            Coverage Diff             @@
##             main      #74      +/-   ##
==========================================
- Coverage   90.56%   83.06%   -7.50%     
==========================================
  Files          90       93       +3     
  Lines        1558     1760     +202     
==========================================
+ Hits         1411     1462      +51     
- Misses        147      298     +151     

Flag	Coverage Δ
pytest	83.06% <27.40%> (-7.50%)	⬇️

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

Impacted Files	Coverage Δ
ensysmod/core/file_download.py	21.73% <21.73%> (ø)
ensysmod/utils/encoders.py	22.07% <22.07%> (ø)
ensysmod/crud/base_depends_timeseries.py	58.69% <29.62%> (-41.31%)	⬇️
ensysmod/crud/energy_transmission_distance.py	71.42% <33.33%> (-10.39%)	⬇️
ensysmod/api/endpoints/datasets.py	72.13% <35.29%> (-14.24%)	⬇️
ensysmod/crud/base_depends_component.py	84.61% <75.00%> (-2.35%)	⬇️
ensysmod/crud/ts_capacity_fix.py	100.00% <100.00%> (ø)
ensysmod/crud/ts_capacity_max.py	100.00% <100.00%> (ø)
ensysmod/crud/ts_operation_rate_fix.py	100.00% <100.00%> (ø)
ensysmod/crud/ts_operation_rate_max.py	100.00% <100.00%> (ø)
... and 1 more

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[github-actions]

Unit Test Results

  1 files  ±0    1 suites  ±0   29s ⏱️ -3s
62 tests ±0  62 ✔️ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit e1dd40d. ± Comparison against base commit 0ea55ad.