general purpose function for strictly fetching array keys

[simonLeary42]

• moved array getting logic from UnitySite::arrayGetOrBadRequest into general-purpose \arrayGet in a new file utils.php
• replaced UnitySite::arrayGetOrBadRequest with getPostData
• updated account.php to delete the uploaded SSH key file after reading into memory
• updated account.php to check for the case when file_get_contents returns false

[Copilot]

Pull Request Overview

This PR refactors array access logic by extracting a general-purpose \arrayGet function from the existing UnitySite::arrayGetOrBadRequest method and replacing it with more specific wrapper functions. The changes improve code organization by separating generic array access from HTTP-specific error handling.

• Extracted \arrayGet utility function with proper exception handling
• Replaced UnitySite::arrayGetOrBadRequest with specific getPostData and getUploadedFileContents methods
• Added automatic cleanup of uploaded temporary files after reading

Reviewed Changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
webroot/panel/account.php	Updated to use new specific accessor methods instead of generic array accessor
test/unit/UtilsTest.php	Added comprehensive test coverage for the new \arrayGet function
test/unit/UnitySiteTest.php	Removed obsolete tests for the old arrayGetOrBadRequest method
test/phpunit-bootstrap.php	Added required includes for new utility and exception files
test/functional/SSHKeyAddTest.php	Updated test to verify automatic file cleanup behavior
resources/lib/utils.php	Implemented new general-purpose \arrayGet function
resources/lib/exceptions/ArrayKeyException.php	Added new exception class for array access errors
resources/lib/UnitySite.php	Replaced generic method with specific getPostData and getUploadedFileContents methods
resources/autoload.php	Added includes for new utility and exception files

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