docs(README): init readme

Author: Lee-W

README.md

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+# commitizen cz template
+
+cz template for [commitizen](https://github.com/Woile/commitizen)
+
+## Prerequiste
+* Python 3.x
+* [cookiecutter](https://cookiecutter.readthedocs.io/en/latest/)
+    * `python -m pip install cookiecutter`
+
+## Usage
+
+1. Initialize project through cookiecutter
+
+    ```sh
+    cookiecutter gh:Lee-W/commitizen_cz_template
+    ```
+
+    Note that you don't need to add cz prefix in your project name and package name.
+
+2. Implement the `questions` and `message` function in your `cz_[cz_name].py`
+3. Publish it to [pypi](https://pypi.org/) or install locally through `pip install .`
+4. Test through `cz --name cz_[cz_name] [command]`
+
+## Lisence
+[MIT](https://opensource.org/licenses/MIT)
+
+## Author
+[Lee-W](https://github.com/Lee-W/) (weilee.rx@gmail.com)