Further CI improvements

[zaneselvans]

• Add CodeCov integration.
• Clean up notebook and add some more pre-commit hooks.
• Remove my intake catalog performance testing class.
• Add some package metadata to the top level __init__.py

[codecov-commenter]

Codecov Report

Merging #15 (72f1f00) into main (12480c5) will increase coverage by 67.2%. The diff coverage is 100.0%.

@@           Coverage Diff            @@
##            main     #15      +/-   ##
========================================
+ Coverage   25.2%   92.5%   +67.2%     
========================================
  Files          3       2       -1     
  Lines         95      40      -55     
========================================
+ Hits          24      37      +13     
+ Misses        71       3      -68     

Impacted Files	Coverage Δ
src/pudl_catalog/__init__.py	100.0% <100.0%> (ø)

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