Feature to check for similar functions

[tomsons26]

Would be useful to have an option in right click on a function to check and list similar functions to this.
As a first implementation this could just be a simple score if greater than current comparison.

This would be of much use when doing for example functions where a lot of code is reused between them, allowing to quickly check if anything that is already written is anything like this.
If that's the case one may want to use that code as a starting point rather than doing the whole function from nothing.