If you are not familiar with Wine (or maybe even if you are), you may find the article Understanding Wine helpful. A more complete reference is the WineHQ Wine User's Guide. Also see the Wine List of Commands.
Install Wine on Solus 4
Solus includes Wine in its repositories, which makes installing Wine easy.
The search results offer both "wine" and "wine-devel". As the time of this writing, both install Wine Stable 5.0. In the past, when Wine 4.x was current, both installed the same version of Wine Development. Before proceeding, note which versions of Wine "wine" and "wine-devel" install, and, if different, decide which is best for you.
$ wine --version
Now that Wine is installed, take a look at the article Using Wine for information on installing Windows applications.
There is also an article CSS HTML Validator installation with Wine which contains specific instructions for installing and configuring CSS HTML Validator.