fix!: refactored shape of tensors and traits for easier expression of…

[c0dearm]

… dimensions constraints

[codecov-commenter]

Codecov Report

Merging #19 (72fa240) into main (0daf964) will increase coverage by 1.68%.
The diff coverage is 91.68%.

@@            Coverage Diff             @@
##             main      #19      +/-   ##
==========================================
+ Coverage   88.48%   90.17%   +1.68%     
==========================================
  Files          14       16       +2     
  Lines         738      763      +25     
==========================================
+ Hits          653      688      +35     
+ Misses         85       75      -10     

Impacted Files	Coverage Δ
src/graph/tape.rs	100.00% <ø> (ø)
src/tensor/constant.rs	85.10% <84.78%> (-14.90%)	⬇️
src/nn/layers/dropout.rs	88.88% <87.50%> (ø)
src/tensor/variable.rs	88.52% <87.50%> (-8.98%)	⬇️
src/tensor/mod.rs	88.88% <88.88%> (+0.88%)	⬆️
src/ops.rs	92.00% <92.00%> (ø)
src/gen.rs	100.00% <100.00%> (ø)
src/graph/node.rs	92.38% <100.00%> (+9.52%)	⬆️
src/lib.rs	100.00% <100.00%> (+2.77%)	⬆️
src/nn/activations.rs	91.30% <100.00%> (ø)
... and 7 more

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