have a jbang resolve or jbang export than just fetch dependencies

[maxandersen]

usecase is to allow use jbang resolution together with existing toolchains.

i.e. today jbang export portable <scriptref> assumes there always is a scriptref to start with.

what if you could do jbang export libs --deps g:a:v,g:a:v and a libs folder will be created with the content in there.

not sure if we want new command or just allow existing export commands work without a scriptref trigger it work as a resolve only.

recent discussion: https://www.reddit.com/r/java/comments/194o1wh/the_java_command_line_workflow/

[quintesse]

This is obviously very useful functionality and we should definitely add this.

Soapbox: but to me it's also an example of what we discussed earlier in one of our chats, that JBang in my opinion is getting a bit big, with useful features like this somewhat "pushed down" and added to sub(sub) commands that are not part of its main functionality. This makes them less accessible, and therefore less useful, when they could/should be a central part of making "Living with Java" easier.