Provide NINA Warning Level and more Topic Selections

First my appreciation for providing this intergration.
I’m a heavy user of the DWD integration. And I prefer compact notifications. And my foremost use case with NINA is Disaster Warning.

From that perspective, I propose the following extensions to NINA:

  1. new Attribute: Warning Level
  2. expand the tracking choice, from excluding Covid/Corona messages to a broader range of choices, like excluding DWD Warnings.