Feature Request: Zola version variable

[extua]

Jekyll has a variable for printing the current version number.

For example, with Jekyll version 4.3.3, {{ jekyll.version }} will print 4.3.3.

I use this in an existing Jekyll site to set the generator metadata name.

<meta name="generator" content="Jekyll 4.3.3" />

This can be useful when debugging to be certain that a page was generated with a specific version of the software.

I would like to request a similar variable for Zola.

[Keats]

I think it could be added