recipetool: create: add basic support for new npm fetcher/class
Add detection for npm modules and support for extracting the name and
version from package.json as is usually part of an npm module contents.
Note: this will likely only produce a buildable recipe if you use an
npm:// URL; simply pointing to a node.js source repository isn't going
to fetch the module's dependencies. It also doesn't set up the
shrinkwrap/lockdown automatically, so there is some room for improvement
later.
Implements [YOCTO #8690].
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
