Adds type annotations

[oke-aditya]

Starts adding Type Annotations.

[codecov]

Codecov Report

Merging #50 (7d3ab3b) into master (9f7239b) will increase coverage by 0.06%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #50      +/-   ##
==========================================
+ Coverage   78.68%   78.74%   +0.06%     
==========================================
  Files          41       41              
  Lines        1370     1374       +4     
==========================================
+ Hits         1078     1082       +4     
  Misses        292      292              

Flag	Coverage Δ
unittests	78.74% <100.00%> (+0.06%)	⬆️

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Impacted Files	Coverage Δ
quickvision/models/classification/cnn/engine.py	78.16% <100.00%> (+0.09%)	⬆️
...kvision/models/components/torchvision_backbones.py	94.31% <100.00%> (ø)
quickvision/models/detection/detr/engine.py	82.26% <100.00%> (+0.12%)	⬆️
quickvision/models/detection/detr/model_factory.py	100.00% <100.00%> (ø)
quickvision/models/detection/faster_rcnn/engine.py	80.45% <100.00%> (+0.14%)	⬆️
quickvision/models/detection/retinanet/engine.py	82.40% <100.00%> (+0.14%)	⬆️

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