Add Github Action to build and test

[cyri113]

In order to improve the CI/CD pipeline, we must implement automated tests.

If the tests fail or if the code coverage is reduced, the deployment of the pull request should fail. The results of the test should be uploaded to Codeclimate for analysis.

• Create a test command
• Create a Github action
• Upload results to Codeclimate

Documentation:

• https://docs.github.com/en/actions
• https://docs.codeclimate.com/docs/configuring-test-coverage
• https://jestjs.io/

[cyri113]

Deprecated in favour of https://github.com/RnDAO/tc-discordBot