Add keyboard shortcuts to directly open File explorer extentions

### Description of the new feature / enhancement

This allows you to open the PowerToys File explorer extentions (eg powerrename) just by selecting the file(s) and pressing the shortcut instead of having to use the right click menu

### Scenario when this would be used?

when you dont want to use the right-click menu

### Supporting information

No files, tests, or entry points are named. Start by locating the File Explorer extensions and the existing PowerRename context-menu and keyboard-shortcut paths; clarify which extensions and shortcut mappings are supported before defining completion.

Written by the indexing model from the issue text.