feat(service): Add Mastodon service

[nikoksr]

Is your feature request related to a problem? Please describe.

Missing support for the popular social network platform Mastodon.

Describe the solution you'd like

Implement a notification service like we already did for Telegram etc. At the time writing this mattn/go-mastodon seems to be our best option for implementing it.

[bajro17]

I would love to take this one for me.

[nikoksr]

@bajro17 sure, your contribution would be very much appreciated.

[nikoksr]

@bajro17 hope things are going well. Let me know if I can help you with anything.

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[hlatimer266]

hey there! is this feature request still open?

[nikoksr]

@hlatimer266 it is! Would you like me, to assign you to it?

[hlatimer266]

yup! that would be great!

[andrewblack-pnw]

Seems like this task was never completed. I'll take a chance on this one, given the relevance of Mastodon in the recent few weeks.

[nikoksr]

@Elystus that would be amazing! Let us know if you need any help.