Array indent style (code formatting)

Prerequisites

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Summary

Request a setting like pipelineIndentationStyle but for arrays.

Formatting removes my indents:

$folders = "\.git",
"\exampleSite",
"\images",
"\logo.png"

Would be nice to have:

$folders = "\.git",
           "\exampleSite",
           "\images",
           "\logo.png"

And this (first item on new line):

$folders =
    "\.git",
    "\exampleSite",
    "\images",
    "\logo.png"

Proposed Design

No response

Start by locating the existing pipelineIndentationStyle setting and the formatter code and tests that implement it. Compare the requested array examples with current formatting behavior, then define how the setting should apply to arrays and verify both inline continuation and first-item-on-a-new-line cases. Done means the chosen behavior is covered by formatter tests and documented as a setting.