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* add tests for matmul and sharding-matmul benchmarks.

* add decorator for sharding_matmul tests.

* add __init__.py for utils of benchmarks tests.

* disable GPU tests for CPU platform validation.

* fix typo
Co-authored-by: Guoshuai Zhao <guzhao@microsoft.com>
Co-authored-by: Peng Cheng <chengpeng5555@outlook.com>
Co-authored-by: Yifan Xiong <yifan.xiong@microsoft.com>

* add random dataset.

* install pytorch-cpu for test docker.

* fix typo

* add more test cases.

* address comments.
Co-authored-by: Guoshuai Zhao <guzhao@microsoft.com>

Add code coverage configuration.

Initialize setup.py and basic configurations for this project.

Major revisions:

- initialize setup.py for Python package
- add gitignore and dockerignore
- add editorconfig for editors
- configure yapf for auto formating
- configure mypy for type hint
- configure flake8 for lint, including quotes and docstrings
- add pre-commit check for `git commit`
- add spelling check in GitHub Actions
- format existing files according to configured rules

Example usage:

    # install dependencies
    $ python3 -m pip install -e .[dev,test]
    $ pre-commit install

    # format code automatically
    $ python3 setup.py format

    # lint code
    $ python3 setup.py lint

    # test code
    $ python3 setup.py test

**Description**
Init Azure Pipelines for checking format and running pytest.

**Major Revision**
- Add  azure-pipelines.yml for running Azure Pipelines.
- Add Dockerfile and test/test_example.py for checking format and running pytest.