67 - Add NullHandler to package logger

[da1910]

Closes #67

Initializing a logger without a handler can cause warnings, this PR moves the logger into a module and imports it from there. We then configure a NullHandler to avoid the warning being emitted.

[codecov]

Codecov Report

Merging #80 (d449147) into main (9a83910) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main      #80   +/-   ##
=======================================
  Coverage   90.95%   90.95%           
=======================================
  Files           7        8    +1     
  Lines         829      829           
=======================================
  Hits          754      754           
  Misses         75       75           

Impacted Files	Coverage Δ
src/ansys/openapi/common/_logger.py	100.00% <100.00%> (ø)
src/ansys/openapi/common/_oidc.py	74.82% <100.00%> (-0.18%)	⬇️
src/ansys/openapi/common/_session.py	87.28% <100.00%> (-0.08%)	⬇️
src/ansys/openapi/common/_util.py	98.35% <100.00%> (-0.01%)	⬇️

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[Andy-Grigg]

Looks good! I can't think of any negatives to having it in a separate module, since loggers are singletons anyway.