Improve github-actions activation documentation

**Is your feature request related to a problem? Please describe.**
I feel like splitting the steps outside of the file makes it a bit confusing to know where to place these steps when you're starting with Github Actions.

**Describe the solution you'd like**

See section with a blue square in the following picture:


Combining examples into a single file would make it easier to go through the activation process and may reduce confusion about where to place the content.

**Describe alternatives you've considered**
* It would also be nice to be able to download that file, but this is definitely optional.

This issue may also serve as a place to suggest ideas to make it easier to go through activation process.