Add excludedDependencies parameter to unusedDependencies rule

[BenedictP]

Summary

This pull request enhances the unusedDependencies lint rule by adding an excludedDependencies parameter. This allows users to specify dependencies that should be excluded from the unused dependency checks, such as umbrella dependencies.

Details

• Modified the unusedDependencies rule to accept an array of dependency names to exclude from checks.
• Updated the default lint rules to use the new parameter with an example exclusion.
• Adjusted the validation logic to skip dependencies listed in the exclusion parameter.
• Added tests to verify that excluded dependencies are correctly ignored during validation.
• Updated configuration example to demonstrate usage of the new parameter.

This improvement helps keep the project clean and compile times optimized by allowing more flexible linting configurations.

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