Support parameters for running script

[asubb]

It would be nice if CLI tool would support parameters that can be passed into a script

The call may look something like this:

wavebeans-cli --execute "<script content here>" --parameter a=10 --parameter b="string"

The parameters are stored into a script context and provide access via functions

So the script would look like this

val freq = intParam("a")
val file = stringParam("b")

freq.sine().trim(1000).toCsv("file://$file")