Sync transpose (issue #985)

[resu-xuniL]

• Synced Transpose metadata and docs
• Removed strict types comments from example.php and TransposeTest.php
• Added transpose to auto-sync.txt
• Added GitHub handle to config.json
• Added UUID and TestDox to tests
• Fixed example.php to pass new test unit

Had to modify example.php to pass new test cases from problem-specifications

Closes #985

[github-actions]

This PR touches files which potentially affect the outcome of the tests of an exercise. This will cause all students' solutions to affected exercises to be re-tested.

If this PR does not affect the result of the test (or, for example, adds an edge case that is not worth rerunning all tests for), please add the following to the merge-commit message which will stops student's tests from re-running. Please copy-paste to avoid typos.

[no important files changed]

For more information, refer to the documentation. If you are unsure whether to add the message or not, please ping @exercism/maintainers-admin in a comment. Thank you!

[mk-mxp]

Let's make this a difficulty 2 exercise. The padding is a real challenge in itself, I think.

[mk-mxp]

This also may break some solutions, but the requirements were there always. So, I think that's OK.

Thanks a lot for your work!

[resu-xuniL]

My pleasure! thanks.

[resu-xuniL]

I think this PR will break the new 'sorting use' rule