Implement `inputNode` in addition to `input()`

[qix]

Creating a SqrlNode from an input is not possible, you have to create an additional feature.

Expected behavior

LET Ip := inputNode("Ip");

Should provide you with a SqrlNode of type Ip

Actual behavior

The function does not exist yet, you have to instead:

LET Ip := input();
LET IpNode := node("Ip", Ip);

There is no way to have a node with the same name as an input.