feat: add a cpu-only context manager

[MiWeiss]

No description provided.

[codecov]

Codecov Report

Merging #52 (4d64735) into main (fb08f86) will increase coverage by 3.68%.
The diff coverage is n/a.

❗ Current head 4d64735 differs from pull request most recent head f9d60b0. Consider uploading reports for the commit f9d60b0 to get more accurate results

@@            Coverage Diff             @@
##             main      #52      +/-   ##
==========================================
+ Coverage   90.98%   94.66%   +3.68%     
==========================================
  Files          28       27       -1     
  Lines        1076      900     -176     
==========================================
- Hits          979      852     -127     
+ Misses         97       48      -49     

Impacted Files	Coverage Δ
...certainty_wizard/models/ensemble_utils/__init__.py	100.00% <ø> (ø)
...nty_wizard/models/ensemble_utils/_lazy_ensemble.py	91.09% <ø> (ø)

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