Improve and rework the announcer feature

[Sataniel98]

Please describe the use case or the problem your request is related to.
The current announcer system is not very powerful and hardly used. Users often avoid it and use scripted GUIs based on commands instead.

Describe the solution you'd like

• An option menu where the dungeon can be chosen
• More dynamic group system integration
• Better configuration / get rid of the MFD / SFD remnant
• More... (Please comment)

The changes should be made after the group adapter API (#91 ) is done.