[WIP] Update Array extension to ensure unique dependsOnArguments

[Copilot]

Plan to implement unique array extension for SwiftJavaPlugin:

• Understand the current code and build/test structure
• Create an Array extension to make elements unique while preserving order
• Apply the extension to make dependsOnArguments unique
• Write tests for the Array extension (if test infrastructure exists)
• Build and test the changes
• Verify the implementation works correctly

Original prompt

Work on TODO: make the dependsOnArguments unique, and preserve the ordering. We cannot use external dependencies.

Created from VS Code via the GitHub Pull Request extension.

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[ktoso]

Triggered this by accident... the floating buttons all around TODOs in VSCode make it too easy to click it.