param mappings for remaining nets + make face detection and recognition nets extend NeuralNetwork

added describeWithNets test utility, which handles net creation and disposing of net params for the testbench

NeuralNetwork base class + trainable

added NeuralNetwork base class which provides some common functionality, such as making networks trainable

face recognition net now works with batch inputs

Some fixes

fixed memory leaks in extractFaces, imageTensorToCanvas, toNetInput with batch size 1 tensor4d array + removed tests using createFakeHTMLVideoElement as it seems to not load the example video properly some times

added general handling of batch inputs + face landmark net accepts batch inputs now

added some tests to indentify memory leaks in NetInput and face landmark net + fixed leak in detectLandmarks

added batch input example for face landmarks + fixed: return array if batch input with array of length 1

test cases for batch input creation + e2e face landmark net batch input tests + added some face landmark net tests for non squared input

pad face landmark net input to square and center to prevent stretching of input image

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padToSquare fix

make padToSquare padding order append first when size is uneven + fixed issue when dimensions differ by 1 only