[Feature Request]: Custom icons for IOS (SF Symbols)

[SgtBatten]

Describe what you are trying to accomplish and why in non technical terms Currently the icon option only works for Android, not IOS.

Describe the solution you'd like IOS requires a different symbol set as per below.

Icons for notification actions are only allowed from the SF Symbols library, which is different than other icons in Home Assistant which come from Material Design Icons library. This is due to limitations placed on these actions from Apple.

• [ ] Needs new icon field in message data. easy to implement
• [ ] Needs guidance on how to identify symbols (library?)
• [ ] prefix is sfsymbol: instead of mdi:
• [ ] need presets in icon input
• [ ] set default in icon input to empty in case it cause issues with android/ios cross compatibility