Add a setting to add (or remove) parens in if/elseif/switch/case/while/for statements

You can write keyword blocks with or without parentheses:

```
if (true)
end
```
vs.
```
if true
end
```

A nice feature would be to control whether or not to add parentheses to these expressions and also independently set this for each possible keyword that supports this (`if`, `elseif`, `switch`, `case`, `while`, `for`, etc.)