Implement _from_parsed_url for (H)DictStore and add test

[janjagusch]

A first attempt at implementing _from_parsed_url for all stores. Here we start with the DictStore and also add a simple test scaffold.

Checklist

• Added a docs/changes.rst entry

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (7b40a87) 0.00% compared to head (04a48c9) 0.00%.
Report is 1 commits behind head on main.

❗ Current head 04a48c9 differs from pull request most recent head 0ac2454. Consider uploading reports for the commit 0ac2454 to get more accurate results

Additional details and impacted files

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##            main     #84   +/-   ##
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  Coverage   0.00%   0.00%           
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  Files         32      32           
  Lines       1988    1985    -3     
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+ Misses      1988    1985    -3     

Files Changed	Coverage Δ
minimalkv/memory/__init__.py	0.00% <0.00%> (ø)

... and 1 file with indirect coverage changes

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