How to manually determine version control metadata for Finder? I have a Scripts folder where I keep Automator actions, Applescripts, and shell scripts. Automator scripts are automatically assigned a version of 1.1.1 it seems. When I make revisions to any of these kinds of documents, how can I manually set the versions so that info will display in the finder, either with Get Info or in a folder list with Version view enabled?

Especially in the case of shell scripts (zsh), is there a comment format where I can enter the version of the script and Finder will see it? Or is there a way to associate an editable system resource to the scripts that will make the script version visible?
Finder does not keep track of versions as it just represents the file system which under HFS+ does not keep versions. 

I don;t see how to do exactly what you want but I think a way that would work is to use version control as used by programmers - I use this for control of my shell and other scripts.
Examples of this are git, mercurial, svn(subversion) with various GUIs available e.g. SourceTree (for all three).

Git and mercurial work by s saving a set of changes across all files in a project which when you need more than one file you will find is needed. This snapshot of files can be tagged with a name e.g. 1.0.0 etc. Each change is individually labelled with a version control assigned name. The version data is kept in metadata in the version control system and not in the files as putting the version number in the files was found not to be useful. The GUI can browse over the file system and can show the change history.