Add restart in safe mode in restart dialog

[piitaya]

Proposed change

Allow user to restart Home Assistant in safe mode.

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: Make it possible to restart core in safe mode core#102606
• 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

[bramkragten]

We also have to handle safe mode:

• Show message to the user that they are in safe mode and how to get out of it
• Don't load Lovelace resources

[piitaya]

We also have to handle safe mode:

• Show message to the user that they are in safe mode and how to get out of it
• Don't load Lovelace resources

For Lovelace resources : #18382
For the message, I already put a note for the front-end meeting for the UX we want.