Add error handling to device delete

[agners]

Breaking change

Proposed change

Currently, if device delete fails, the frontend stays silent. The user might get hints in the Core logs, but nothing shown on the frontend.

This adds error handling similar to other places.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New feature (thank you!)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Example configuration

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue or discussion:
• Link to documentation pull request:

Checklist

• The code change is tested and works locally.
• There is no commented out code in this PR.
• Tests have been added to verify that the new code works.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for www.home-assistant.io

Summary by CodeRabbit

• Bug Fixes
  • Improved error handling for removing devices from configuration. Users will now see an error message if the removal process fails.

[coderabbitai]

Walkthrough

Walkthrough

The HaConfigDevicePage class was enhanced with error handling during the device configuration entry removal process. Specifically, a try-catch block was added to catch any errors, and an alert dialog is shown with the error message if an error occurs. Additionally, a new translation key "error_delete" with the message "Error deleting device" was added to the en.json file for localization purposes.

Changes

File	Change Summary
src/panels/config/devices/ha-config-device-page.ts	Updated removeConfigEntryFromDevice logic to include error handling using a try-catch block.
src/translations/en.json	Added new translation key "error_delete" with the value "Error deleting device".

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