add apprise notifications

[simonmcnair]

Is your feature request related to a problem? Please describe.
I use apprise and would love to see it added

Describe the solution you'd like
apprise for notifications

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.

[auanasgheps]

Hi, thanks for this. Sure it can be added, could be an easy way to work with many notification systems!

[auanasgheps]

Hi there, providing a quick update:

I've integrated apprise as a proof of concept and it's super easy to use. I quickly tested it with Discord and I wish I knew about this sooner (the Discord integration was so hard to come up with).

I will work on this and update you when it's published in dev.

[auanasgheps]

Released in Beta 2. Please provide feedback!