Add command to output NOTICE file

[jonabc]

This add a new command licensed notices, which outputs a NOTICE file for each configured application. I couldn't find a standard format for the file, so for now it looks like the following, and I'd welcome feedback if there is a preferred format.

THIRD PARTY NOTICES

*****
dependency@version

license text
-----
license text
-----
notice text
-----
notice text

*****
dependency@version
.....

Most of the work happens in the reporter, though it could arguably be done in the command as well 🤷

/cc @mlinksva @jeffmcaffer any opinions on the NOTICE file format?

[jonabc]

any opinions on the NOTICE file format?

@mlinksva @jeffmcaffer ping 👋

[jeffmcaffer]

Not from me per se. As long as it meets legal terms and doesn't look completely horrible (it doesn't) then box checked!