0.4.0

Aditya NG (13):
      feat(download_dataset): functions to download tinyshakespeare and webtext
      feat(sweep): reduced batch size
      fix(sweep): added cuda clean
      test(tests/test_train.py): disable wandb during testing
      ci(main): disabled wandb in ci
      fix(sweep): cuda device
      fix(sweep): max_iters
      feat(sweep): slower learning rate
      docs(mkdocs): documentation for mkdocs
      feat(README.md): results added
      fix(kan_gpt/efficient_kan/__init__.py): missing init file
      version increment
      release: version 0.4.0 🚀