feat: add card deletion during review with confirmation logic and settings

[dangxia]

This PR implements a new feature allowing users to delete cards directly from the Review UI. It includes safety measures to prevent accidental deletions and a global setting to toggle the feature's visibility.

Key Changes

1. UI Enhancements

• Added a Delete button to the Card UI, positioned to the right of the SKIP button.
• Integrated the button with the existing theme to ensure visual consistency.

2. Interaction Logic

• Standard Click: Triggers a confirmation dialog to prevent accidental data loss.
• Power User Shortcut: Holding Command (Mac) or Ctrl (Windows/Linux) while clicking the Delete button will bypass the confirmation and execute the deletion immediately.

3. Configuration & Settings

• Introduced a new configuration option: Enable Delete Button.
• Default State: Set to False (Disabled) to maintain the existing user experience unless explicitly opted-in.

4. Internationalization & Documentation

• Added i18n strings for the Delete button, confirmation prompts, and settings labels.
• Updated relevant documentation to reflect the new functionality and keyboard shortcuts.

[KyleKlus]

Hi, so I had a look at your feature.

I think generally it's a pretty nice feature to have, but I see some difficulties with the current implementation:

1. I think using the default confirm dialog window of the device that one is on, could lead to some difficulties

• Design wise, I think it would look a bit odd, as every confirm dialog looks different from device to device
• When it comes to debugging it would be harder to do so, as again every device has a different confirm dialog and one cant check every device to see if the device specific dialog did some odd thing

So I would propose maybe reusing part of the edit dialog to make a delete dialog sort of like this:

2 . The power user shortcut could lead to accidental data loss

• I think it is far too easy to accidentally double click and delete two cards instead of one
• When one hasn't read the docs, then one doesn't know about the short cut and one could accidentally press it.
• So I think it is a bit too dangerous to have it in there

3. The delete function leaves some empty lines if one wrote the cards with some empty lines around it

• I would at least add some more info to the description of the enable toggle, that this can happen
• Maybe also add that the usage of the button is at ones own risk and will delete the card without being able to restore it