Added a confirmation dialog to prevent accidental file deletions

[superoo7]

As a first-time user of reor, I accidentally deleted a whole folder of important documents. To prevent this from happening to other users, I have added a confirmation dialog that prompts the user to confirm their action before a file is deleted.

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Can probably add a checkbox to the delete confirmation dialog similar to the one in Obsidian.

        checkboxLabel: "Don't ask again",
        checkboxChecked: false,