To be able to provide query strings to redirectToRoute and getRouteUrl

## Description

We should be able to add custom query strings when it is needed.

## Proposal

To be able to provide query strings to `getRouteUrl()`:

```php
use function Folded\getRouteUrl;

echo getRouteUrl("home.index", [], ["page" => 2, "view" => "list"]); // empty second parameter, because no placeholder route to replace
```

To be able to provide query strings to `redirectToRoute()`:

```php
use function Folded\redirectToRoute;

return redirectToRoute("home.index", [], ["source" => "email", "page" => 42]);
```

## Worarkound solutions

To manually add query strings.

## Notes

None.