Feature: Settings for renaming rules

### What feature or improvement do you think would benefit Files?

When moving a file to another folder, there is a function to rename it if the same file name exists, but it would be nice if you could set rules for renaming. This would take this app to a higher level.

### Requirements

- This proposal will accomplish X
- This proposal will accomplish Y
- This proposal will accomplish Z

### Files Version

3.9.1.0

### Windows Version

26100.4061

### Comments

_No response_

Start by locating the existing rename behavior used when moving a file into a folder containing the same name. The issue does not identify files, entry points, rule syntax, or tests, so those details need to be clarified before implementation. Done should mean that explicit renaming rules can be configured and are applied predictably during such moves.

Written by the indexing model from the issue text.