Updating copyright for 2023

[ksbeattie]

Fixes/Addresses:

Updates copyright years to include 2023. Also adding or updating headers to all .py files. Perhaps too many files...

Summary/Motivation:

This replaces PR #1099

Changes proposed in this PR:

• Added a new .addheader.yml config file for running addheader
• Removed whitespace from otherwise empty __init__.py files
• Ran addheader -c .addheader.yml on entire tree to update copyright year

Legal Acknowledgement

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[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (e78aa0b) 33.31% compared to head (d1aa8c3) 33.31%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1112   +/-   ##
=======================================
  Coverage   33.31%   33.31%           
=======================================
  Files         161      161           
  Lines       36426    36426           
  Branches     5950     5950           
=======================================
  Hits        12136    12136           
  Misses      23330    23330           
  Partials      960      960           

Impacted Files	Coverage Δ
foqus_lib/conftest.py	90.52% <ø> (ø)
foqus_lib/foqus.py	24.23% <ø> (ø)
foqus_lib/framework/at_dict/at_dict.py	42.85% <ø> (ø)
...qus_lib/framework/foqusException/foqusException.py	62.96% <ø> (ø)
foqus_lib/framework/foqusOptions/option.py	28.08% <ø> (ø)
foqus_lib/framework/foqusOptions/optionList.py	67.50% <ø> (ø)
foqus_lib/framework/graph/OptGraphOptim.py	16.66% <ø> (ø)
foqus_lib/framework/graph/edge.py	55.40% <ø> (ø)
foqus_lib/framework/graph/graph.py	53.66% <ø> (ø)
foqus_lib/framework/graph/heatIntegration.py	0.00% <ø> (ø)
... and 151 more

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[lbianchi-lbl]

This looks OK, but I think we should add (the correct version of) addheader to requirements-dev.txt.