Refactor cache stuff into module

[hugovk]

Also replace verbose prints with logging, and add some typing, some via https://github.com/JelleZijlstra/autotyping.

[codecov[bot]]

Codecov Report

Merging #68 (82a917c) into main (bb5d859) will decrease coverage by 0.94%. The diff coverage is 92.15%.

@@            Coverage Diff             @@
##             main      #68      +/-   ##
==========================================
- Coverage   96.69%   95.75%   -0.95%     
==========================================
  Files           8        8              
  Lines         363      353      -10     
==========================================
- Hits          351      338      -13     
- Misses         12       15       +3     

Flag	Coverage Δ
GHA_Ubuntu	95.75% <92.15%> (-0.95%)	:arrow_down:
GHA_Windows	95.75% <92.15%> (-0.95%)	:arrow_down:
GHA_macOS	95.75% <92.15%> (-0.95%)	:arrow_down:

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

Impacted Files	Coverage Δ
src/norwegianblue/cli.py	0.00% <0.00%> (ø)
src/norwegianblue/__init__.py	98.44% <83.33%> (+1.35%)	:arrow_up:
src/norwegianblue/_cache.py	94.11% <94.11%> (ø)
tests/test_cache.py	100.00% <100.00%> (ø)
tests/test_norwegianblue.py	100.00% <100.00%> (ø)

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[hugovk]

The coverage "drop" is because we've deleted a file of code.

Looking at the deltas of the remaining files, they're either the same or have increased.