TypeScript Rename File Refactoring

[maxime1992]

When moving a file (drag'n drop), we then have to manually change every path where we used that file.

It would be nice to update all the import where we used that file.

[mousetraps]

Cool idea!

cc @bpasero @dbaeumer @mjbvz

[dbaeumer]

@waderyan this would best require some support from TypeScript to find all places where the file to be moved is referenced.

[mjbvz]

The change file location refactoring required to implement this is tracked by microsoft/TypeScript#6487