* Restricted Linux CI build to only run on changes to code,
translations, software lists, and build scripts.
* Restricted Windows/macOS CO to only run on changes to code and build
scripts. They provide nothing over Linux for the other stuff.
* Added plugin properties and controller file validation to the "hash"
workflow.
* Added a workflow for building documentation, so pull requests that
affect documentation will at least get a basic check in advance.
-plugins/autofire: Bumped version as configuration format has changed.
