docs: add definition for generic Type parameter in AnyContains Javadoc

[LalitNarayanYadav]

Problem

The generic parameter Type in the AnyContains interface was not documented, which caused confusion for users and contributors about its purpose and usage.

Solution

Added a clear and detailed Javadoc description for the Type generic parameter in the AnyContains interface. This documentation explains what Type represents, how it relates to the contains method, and how implementations should handle type safety via isSafeToCheck.

Testing Completed

Reviewed the updated Javadoc locally to ensure clarity and correctness. No functional code changes were made, so no unit tests were necessary.

Supporting Information

This change improves code readability and developer experience by clarifying the usage of generics in the AnyContains interface.

Completes: #7902
Related: none

[Efnilite]

just a note for future PRs: you should make it target the dev/patch branch when creating bug fixes or the dev/feature branch for features and breaking changes. thanks for contributing!

[LalitNarayanYadav]

Thanks @Efnilite ! I will keep it in mind while contributing next time.