[Content] add recommendations about minimizing packages to JavaScript Guidelines

[possumbilities]

Problem

There's no guidance for contributors when solving a problem by utilizing packages within a node ecosystem project. There should be some measure of reasonable guidance that is not so specific as to hinder work, but also to keep a balance of clarity and reduce unnecessary complexity.

Description

Find, research, and outline specific guidance about keeping this to a minimum, ways to rectify this, and bridging differing philosophical routes to ensure that sprawl is absent or minimal.

Some key points:

• better to write a function than include a package.
• what is the threshold (ex. lines of code) for re-implement vs package inclusion
• when in the project lifecycle should packages be reduced

Additional context

• JavaScript Guidelines — Creative Commons Open Source