[SITE][FEATURE] Add data-driven current version shortcode

[ShaunaGordon]

Describe the feature you'd like available on the website

Right now, current engine version is hardcoded everywhere, needing a lot of search and replace to update it. Ideally, we should be able to draw from one location to get that value.

Proposed implementation

Create a shortcode that handles getting a site param that we can then use in the content files.

We then update all the references to current version, where the value changes on each release, so that things update automatically going forward.

Available alternatives

None, really.

Supplements

https://gohugo.io/templates/shortcode/