Added Batch Normalization Layer modules#157

Draft

Spnetic-5 wants to merge 9 commits intomodern-fortran:mainfrom

Spnetic-5:batch_norm

Commits on Aug 10, 2023

Added batch norm layer modules
Spnetic-5
committed
Update cmake
Spnetic-5
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Update forward & backward formulae
Spnetic-5
committed

Commits on Aug 20, 2023

Added draft test for batch norm layer
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committed