Function getUniqueConditionSets

Get the minimal set of conditions that can potentially produce different resolution values for a given imports or exports object from a package manifest.

For example:

{
  ".": [{"import":[{"types":"x.d.ts"},"x.mjs"], "require":"y.js"}]
  "./a": {"browser":{"require":"./a.js"}},
  "./b": {"browser":"./b.js"},
  "./c": {"require":{"browser":"./c.js"}}
}
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would return:

[
  ['import','types'],
  ['import'],
  ['require'],
  ['browser'],
  ['browser', 'require'],
]
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With the ['require', 'browser'] condition set omitted, as it is already covered by ['browser', 'require'].

Condition ordering is arbitrary and not guaranteed to be consistent.