text: Title: [FEATURE] Add embeding ranker in PyTorch
  Body: ### Description
  <!--- Describe your expected feature in detail -->
  https://www.tensorflow.org/recommenders/examples/basic_ranking, but using PyTorch instead of TF
  
  ### Expected behavior with the suggested feature
  <!--- For example:  -->
  <!--- *Adding algorithm xxx will help people understand more about xxx use case scenarios. -->
  
  ### Willingness to contribute
  <!--- Go over all the following points, and put an `x` in the box that apply. -->
  - [ ] Yes, I can contribute for this issue independently.
  - [ ] Yes, I can contribute for this issue with guidance from Recommenders community.
  - [ ] No, I cannot contribute at this time.
  
  ### Other Comments
  