introduce message component

[felixhaeberle]

Create

• create command to open message view
• create message view
• integrate message component

Change

• adjust message view for more complex messages (show variant count)
• link variant count with command to open message view

Concept

@nils.jacobsen said in INLMC-81:

Integration in Sherlock:

https://www.loom.com/share/2249876d521a414b9e5e92037837fd92

TL;DR:
The message bundle component needs to go into a separate window, but for complexity level 1 we want to have something similar to what we have rn.