feat(gui): add RTL support to delete-confirmation-prompt

[pishi-ai]

This commit adds RTL (Right-to-Left) language support to the delete-confirmation-prompt component in scratch-gui.

Resolves

In RTL languages, when multiple sprites are opened, the confirmation prompt extends beyond the window boundary. This PR fixes that issue by properly handling RTL layout.

Proposed Changes

• Updated layout and styles to support RTL rendering for the delete-confirmation-prompt
• Adjusted alignment logic and directional styling
• Ensured icon and button positioning respects RTL direction
• Modified 6 existing files
• Added 1 new file

Reason for Changes

RTL language support is essential for accessibility and internationalization. Without proper handling, the confirmation prompt becomes unusable in RTL contexts. This update ensures consistent behavior and layout across both LTR and RTL languages.

Test Coverage

• Manually tested the delete-confirmation-prompt in RTL and LTR languages
• Verified the prompt displays fully within the window and aligns correctly
• Confirmed no regression in LTR behavior

[github-actions]

Thank you for your submission, we really appreciate it. Like many open-source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution. You can sign the CLA by just posting a Pull Request Comment same as the below format.

---

I have read the CLA Document and I hereby sign the CLA

---

1 out of 2 committers have signed the CLA.
✅ (pishi-ai)[https://github.com/pishi-ai]
❌ @pishi.ai
pishi.ai seems not to be a GitHub user. You need a GitHub account to be able to sign the CLA. If you have already a GitHub account, please add the email address used for this commit to your account.
_{You can retrigger this bot by commenting recheck in this Pull Request. Posted by the CLA Assistant Lite bot.}

[pishi-ai]

I have read the CLA Document and I hereby sign the CLA

[cwillisf]

@pishi-ai, thanks for your help! I really appreciate the testing notes, too.

[cwillisf]

@KManolov3, do you have time to review this? If not, let me know.
I took a quick look: it seems generally reasonable, but you're the expert here :)

[KManolov3]

This looks good! I think we should try to get it merged for one of the upcoming releases.

[cwillisf]

Sorry for the bother, @pishi-ai, but could you merge from our develop branch into this PR's branch?

It looks like something went wrong and prevented the normal build-and-test steps from running for this PR. I've adjusted our settings, so those steps should run if you make any changes to this PR. Merging from our develop branch seems like the most innocuous change available :)

[pishi-ai]

I have read the CLA Document and I hereby sign the CLA