feature request: support lists in path expression dicts

[grsjst]

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the put(+KeyPath, +Value) predicate allows to add a value using a keypath. However, the keypath expression does not support lists currently.

Consider the following dict X = _{a:[_{b:Value}]}

I'd like to assign a value to Value using a keypath. Something like : Y = X.put(a[0]/b,"my value"). Note a[0] refers to the first element of the list, similar to a xpath expressions

thanks, joost