Add Refactoring to recognize basic rename (such as local variable)

More complex stuff would likely require using Eclipse's JDT and parsing the source code

This could be added as part of BECR (Be Enchanced Code Refactoring). If desired, a separate issue would be logged for this more complex rename recognition

For a basic rename, the goal is similar to the enchanced for refactoring - handle the basic, common use case of renaming a local variable