add_config_metadata

[cmmorrow]

• Added metadata keys to config_schema.json.
• Added metadata to release.yaml and package.yaml.
• Added new unit tests.

[codecov-commenter]

Codecov Report

Merging #72 (8228e6b) into main (b6511dc) will increase coverage by 95.77%. The diff coverage is n/a.

@@            Coverage Diff            @@
##           main      #72       +/-   ##
=========================================
+ Coverage      0   95.77%   +95.77%     
=========================================
  Files         0       10       +10     
  Lines         0     1490     +1490     
=========================================
+ Hits          0     1427     +1427     
- Misses        0       63       +63     

Flag	Coverage Δ
unittests	95.77% <ø> (?)

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

Impacted Files	Coverage Δ
build_magic/cli.py	98.94% <0.00%> (ø)
build_magic/output.py	99.49% <0.00%> (ø)
build_magic/macro.py	100.00% <0.00%> (ø)
build_magic/exc.py	100.00% <0.00%> (ø)
build_magic/actions.py	89.73% <0.00%> (ø)
build_magic/__main__.py	0.00% <0.00%> (ø)
build_magic/reference.py	99.37% <0.00%> (ø)
build_magic/runner.py	94.69% <0.00%> (ø)
build_magic/__init__.py	100.00% <0.00%> (ø)
build_magic/core.py	97.10% <0.00%> (ø)

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