feat: Add UI support for PTZ presets (#1920)

- Closes #1889

Whilst a simple change theoretically, the card has such a collection of
surfaces that can overlap other surfaces, it's challenging to get this
to work right! There's a real chance this will have broken something
z-index related (e.g. X overlaps Y when it should not), or (for related
reasons) broken curver corners on the card.

src/types.ts

@@ -153,6 +153,10 @@ export interface Icon {
   fallback?: string;
 }
 
+export interface Interaction {
+  action: string;
+}
+
 // *************************************************************************
 //                     Home Assistant API types.
 // *************************************************************************