fix(firebase_ui_auth): actionsBeforeDelete callback

[khanliKU]

Description

Add actionsBeforeDelete callback to ProfileScreen and DeleteAccountButton

Related Issues

N/A

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Breaking Change

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[khanliKU]

I wanted to provide some additional context:
In my application, I needed to perform some cleanup work after the user accepted the "delete user" dialog. I wanted to ensure that all user records were cleared in the Firestore database, so I added an actionBeforeDelete callback. I wanted to share it with the community.