cmdpal: Add "file" context items to the run items too (#40768)

After #39955, the "exe" items from the shell commands only ever have the
"Run{as admin, as other user}" commands. This adds the rest of the
"file" commands - copy path, open in explorer, etc.

This shuffles around some commands into the toolkit and common commands
project to make this easier.

<img width="814" height="505" alt="image"
src="https://github.com/user-attachments/assets/36ae2c75-d4d6-4762-98ec-796986f39c20"
/>