Formula-Cookbook: add std_npm_args

[p-linnane]

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Adds the new std_npm_args to the Formula Cookbook.

[p-linnane]

Style was failing unless I put require "language/node" in single quotes.

[MikeMcQuaid]

I appreciate this critique should have probably landed in the prior PR but: my concern with documentation like this is it inevitably results in the docs and the code becoming out of sync. What would you think about adjusting the docs to link to the code instead?

[p-linnane]

@MikeMcQuaid So remove the actual listed args, and just have a list of std_*_args that are links to the lines in the codebase?

[carlocab]

@MikeMcQuaid So remove the actual listed args, and just have a list of std_*_args that are links to the lines in the codebase?

Or the online documentation, e.g. https://rubydoc.brew.sh/Formula.html#std_configure_args-instance_method. Some of it sucks though (e.g. https://rubydoc.brew.sh/Formula.html#std_cmake_args-instance_method)

I'm also not opposed to ripping it all out and just referencing the std_*_args as something you should use in a formula.

[carlocab]

I'm ok for feedback to be fixed in succeeding PRs.