Add gherkin format tool to unify feature files code style (#466)

* Install format gherkin

* Check Gherkin feature format in workflow

* Format

* Fix pull request workflow

* Use absolute path in makefile

* Add test target

* Install in user mode

* Fix poetry run error

* Setup python version

* Improve check and fmt target cmd

* Setup python version in build job

* Split gherkin feature format check step

* Fix python env setup in centos7

* Fix target typo