use jsonschema $id w/ cue import --path

[cueckoo]

Originally opened by @proppy in cuelang/cue#394

I'm trying to use bulk cue import a collection jsonschema files in the same package, is there a way to pass jsonschema $id (or title) field as the --path flag of the cue importcommand in order to uniqulity identify each schema?

Are the --path reference resolved against the jsonschema before or after its conversion to cue? (it seems that it is the later).

[cueckoo]

Original reply by @mpvl in cuelang/cue#394 (comment)

There currently isn't, partly as the attributes are not available from with CUE itself and $id is an attribute.

However, one possibility is to pull the $id into the struct generated for the --with_context flag. I'll be all in favor of that.

This should at this time also include the recognized file type.