Add completion and intention for named parameter comments

[King2500]

function action($name, bool $isExternal) {
}
$foo->action('bar', <caret>);

At least for boolean parameters:

/*isExternal:*/ true
/*isExternal:*/ false

Which results in:

$foo->action('bar', /*isExternal:*/ true);

[King2500]

Maybe also reference parameter variable name, so we can safely rename that.