Add docs link, misc format tweaks

src/Mode.php

@@ -30,7 +30,7 @@ enum Mode
         return match (true) {
             str_starts_with($dsn, 'pgsql:')  => Mode::PgSQL,
             str_starts_with($dsn, 'sqlite:') => Mode::SQLite,
-            default => throw new DocumentException('This library currently supports PostgreSQL and SQLite')
+            default => throw new DocumentException('This library currently supports PostgreSQL and SQLite'),
         };
     }
 }