GitHub Actions plugin: add support for Python and Nodejs

[IronCore864]

Description

At the moment, the github actions plugin only can create workflows for Golang. We need to be able to support Python and Nodejs (we use them ourselves, so these two have higher priority than other programming languages).

For Python, maybe we can create some simple workflow like this one:
https://github.com/actions/starter-workflows/blob/a85155b04a1b885de7a5021312303fe5c1cb58e4/ci/python-app.yml
More research in github actions starter workflows is welcome.

For Node, it's a bit more complicated because some use node alone, some use it with webpack, some use it with gulp, etc.
Examples:

• https://github.com/actions/starter-workflows/blob/a85155b04a1b885de7a5021312303fe5c1cb58e4/ci/node.js.yml
• https://github.com/actions/starter-workflows/blob/a85155b04a1b885de7a5021312303fe5c1cb58e4/ci/webpack.yml
• https://github.com/actions/starter-workflows/blob/a85155b04a1b885de7a5021312303fe5c1cb58e4/ci/npm-grunt.yml
  Some more research in this repo might help. We might need to add more parameters to the config to support different options.

[IronCore864]

Let's try to finish this tomorrow so that we can focus on testing next week and prepare for the v0.0.1 release. @lfbdev @daniel-hutao

[daniel-hutao]

Let's try to finish this tomorrow so that we can focus on testing next week and prepare for the v0.0.1 release. @lfbdev @daniel-hutao

Maybe we need to merge #47 and close #7 first.

[daniel-hutao]

We'll try to finish this today together.

[daniel-hutao]

#69