add deploy workflows for project using git-revisions plugin

[esuomi]

Hi @tvirolai ! Here's the stuff for #16 , although I recommend you to not maybe merge this directly but instead adapt it to your needs. I'll leave ample amount of comments to the changed files to work as guide.

[esuomi]

Some general notes:

• Before taking this into use, you need to create an initial version tag to the repository. Otherwise the plugin just errors out with an unhelpful error message :)
• I added the two variant workflows as their own workflow definitions to keep things clear. Obviously you may want to merge the logic.
• pom.xml isn't really needed anymore, if its contents such as contributors has value to you, considering using :pom-addition