add: parameter injection pattern

[fkromer]

again with clean files from clean branch

[codecov-io]

Codecov Report

Merging #191 into master will increase coverage by 0.06%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #191      +/-   ##
==========================================
+ Coverage   94.59%   94.66%   +0.06%     
==========================================
  Files          57       59       +2     
  Lines        2368     2399      +31     
==========================================
+ Hits         2240     2271      +31     
  Misses        128      128

Impacted Files	Coverage Δ
dft/parameter_injection.py	100% <100%> (ø)
tests/test_parameter_injection.py	100% <100%> (ø)

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