Further improved the docs and updated the dependencies

Updated swift action version.

Updated the dependencies

Updated the docs

Ran the code through the formatter and updated the docs

Added a missing public init to the EmptyContent placeholder

Added missing static route helper for types supporting HXTemplateable…

… protocol

Added a new basic dynamic htmx template and added a way to customise …

…its default template name and a slot name

Exposed a private function for a naive language code generalisation

Removed Mac from the test targets in GitHub Actions. It just does not…

… want to work.