Added support for array multi line function comments

[martinssipenko]

This change adds the ability to define array structures over several lines.

Background:

PHPStan allows using array shapes that can quickly turn into very long comment lines and this change allows them to be broken over several lines for readability purposes without having to disable the given Sniff.

/**
 * @param array<array{
 *            foo: array{foo: int},
 *            bar: int
 *        }> $bb B.
 */
public function multiLineArray(array $bb)
{
}

Before:

Would result in Squiz.Commenting.FunctionComment.MissingParamName or Squiz.Commenting.FunctionComment.MissingParamTag or similar errors.

And the doc block would need to be written as:

/**
 * @param array<array{foo: array{foo: int}, bar: int}> $bb B.
 */

After:

No errors are being reported.

[jrfnl]

@martinssipenko I haven't looked at this PR in detail, but if you are still interested in contributing this to PHPCS, I'd be happy to look at this if pulled to the new repo: https://github.com/PHPCSStandards/PHP_CodeSniffer