[Feature Request]: Apprise support or editable keys for webhook.

### Is there an existing feature request for this? - [x] I have searched the existing issues ### What is your feature request? Currently webhook sends text like `"text":"Job started on main: My backup"` I'm using Apprise with all my notifications since it supports a lot of different messengers. (Telegram, Discord etc) Apprise does need always at least "body" key. A setting which allows changing "text" would be nice. OR You can send messages with CURL also. Then we would need two fields which accept curl command; success and failure (and maybe start, etc...) Example: **On success:** curl -X POST -F "body=Mediabackup done" http://192.168.x.x/notify/apprise **On Failure:** curl -X POST -F "body=Mediabackup failed" http://192.168.x.x/notify/apprise or even **On success:** curl -X POST -F "body=Mediaserver safe!" -F "title=Successful backup" http://192.168.x.x/notify/apprise Third option is of course building native Apprise support with correct keys. ### Code of Conduct - [x] I agree to follow this project's Code of Conduct