feat(workflow): Add command to generate GHA workflow

[jcs090218]

For #141.

[Fuco1]

I tried this here and it seems to work fine. https://github.com/Fuco1/org-pretty-table/actions/runs/4342695733

One thing I don't get is that it does not add "install-deps" step. Is this automatically handled by the setup-eask action? If not, I would add it to the workflow file.

[jcs090218]

It is handled by eask install. By default, when you install a package, package.el will install all required dependencies.

But yes, if you are using test frameworks or development packages. You will need eask install-deps --dev!

[jcs090218]

Oh, BTW, the single file template is located in https://github.com/emacs-eask/template-generate.