GitLab

* benchmarks init.
Co-authored-by: Guoshuai Zhao <guzhao@microsoft.com>

Add code coverage configuration.

* Setup: Add contribute rules

Initialize README.md and update SUPPORT.md, update
* project description
* installation
* usage
* developer guide
* add dependencies version requirement

Update some lint rules, including:
* change max line length from 79 to 120, following [pytorch]
* add dedent_closing_brackets in yapf
* remove typed def requirements in mypy

Fix return code bug in setup.py, when lint/test command return 1,
`os.system` will return 256 and `sys.exit(256)` will get return code 0.

[pytorch]: https://github.com/pytorch/pytorch/blob/d1dcd5f/.flake8#L3

Add template for PR, bug report and enhancement request

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

* Setup: Reviewers - Add default reviewers of the repo

**Description**
Add default reviewers of the repo

**Major Revision**
- Add default reviewers of the development
- Add default reviewers for the docs

**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.