Add SafeCastSnippet Utility

[ayshgoyl]

Summary

Fixes #246
Implements the SafeCastSnippet utility for safely casting objects using generics and returning the result as an Optional, avoiding ClassCastException.

Changes

• Added SafeCastSnippet with a generic safeCast(Object obj, Class<T> clazz) method.
• Returns Optional.empty() when the object cannot be cast to the requested type.
• Added unit tests covering both successful and unsuccessful cast scenarios.
• Updated the README to include the new snippet.

Testing

• Verified the project builds successfully with Java 21.
• Ran the test suite successfully using:

./gradlew clean test

[stale]

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