Boolean option properties are not parsed as booleans when passed via command line

For boolean properties passed via command line, e.g.
```
--option @typespec/http-client-csharp.new-project=false
```

the option ends up getting parsed as a string even though the option's schema defines it as a boolean. It is parsed correctly as a boolean when using tspconfig.yaml.

The compiler should attempt to parse it as a boolean (based on the schema) regardless of whether using config or command line.