tool-cache: Support for extracting xar compatible archives (#207)

* Test xar extraction

* Support for extracting xar compatible archives

* Only allow extractXar on mac

* Create xar during test instead of using prebuilt

* Update lockfiles

* Add verbose flag if debug

* Add extractXar example to readme

* Revert "Update lockfiles"

This reverts commit a6cbddccf6bf8f7278948e719dc9e28329608cdf.

* Use node pkg in example

* Remove and ignore prebuilt xar

* Tests for non-existing dir and without flags

* Better arguments handling

* Make sure that target directory exists

Co-authored-by: Thomas Boop <52323235+thboop@users.noreply.github.com>

__tests__/data/archive-content/file-with-ç-character.txt

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+file-with-ç-character.txt

__tests__/data/archive-content/file.txt

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+file.txt contents

__tests__/data/archive-content/folder/nested-file.txt

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+folder/nested-file.txt contents