Add NPM support, please

[bogdanbiv]

Is your feature request related to a problem? Please describe. A clear and
concise description of what the problem is. Ex. I'm always frustrated when [...]
Given Deno now supports installing packages from NPM, https://deno.land/manual@v1.29.1/node, it would be nice if Trex supported this too.

Describe the solution you'd like A clear and concise description of what you
want to happen.
Please support npm protocol as a source for packages, parse npm:hello...

Describe alternatives you've considered A clear and concise description of
any alternative solutions or features you've considered.
installing myself,

Additional context Add any other context or screenshots about the feature
request here.
Would allow porting tools such as storybook that depend on NPM.

[Dragonizedpizza]

Indeed, I require this feature as well.

[ghaerdi]

I think --npm flag to install npm dependencies but not sure what would be the short version. -n is for --nest. Just --npm?

[RivierGrullon]

I think we can just put --npm @ghaerdi