Installing Cadre still requires a little bit of SQL and sleight of hand, but installer.star is nearly done and will take away all the pain. The important bit is that you need to create the database schema by hand (as used by $db_schema in config.php), and then run the incomplete version of installer.star to generate the tables and the first user, who will have the username "installer" and the password "cadre", both of which should be changed immediately.
Hint: the .star file extension is used for outward-facing PHP files. You'll need to reconfigure your web server to treat them as such.
