[Feature Request] Allow exclude (and include) for tagged relationships too

[ghazi94]

Currently, the exclude (or include) keyword for tags are only supported for kind element. For example,

exclude element.tag == #my_tag

It would be very useful to exclude certain relationships (graph edges) in views by referencing their tags. Something like:

exclude relationship.tag == #my_tag

If relationships could be assigned to variables, the same functionality could be achieved (instead of using tags). For example:

model {
    rel1 = a -> b 'some relationship 1'
}

exlcude rel1